diff --git a/.gitignore b/.gitignore
index a1fc39c..134fdd8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 .gradle
 /build/
+/bin/
 
 # Ignore Gradle GUI config
 gradle-app.setting
@@ -12,3 +13,9 @@ gradle-app.setting
 
 # # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
 # gradle/wrapper/gradle-wrapper.properties
+
+# Eclipse
+.classpath
+.project
+.settings/
+
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e771ddc
--- /dev/null
+++ b/README.md
@@ -0,0 +1,9 @@
+# AppleSingle
+
+This project is an off-shoot of AppleCommander's support for the AppleSingle format in that there are multiple 
+Java-based tools that can benefit from a pre-built library to support the AppleSingle format.
+
+# Resources 
+
+* [AppleSingle spec](http://kaiser-edv.de/documents/AppleSingle_AppleDouble.pdf)
+* [Original ticket for AppleCommander](https://github.com/AppleCommander/AppleCommander/issues/20)
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..350779b
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,13 @@
+apply plugin: 'java'
+apply plugin: 'application'
+apply plugin: 'maven'
+apply plugin: 'signing'
+
+repositories {
+    jcenter()
+}
+
+dependencies {
+    testImplementation 'junit:junit:4.12'
+}
+
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..27768f1
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..92165ee
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.3-bin.zip
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..cccdd3d
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..e95643d
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..4d8eea1
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'applesingle'
diff --git a/src/main/java/io/github/applecommander/applesingle/AppleSingle.java b/src/main/java/io/github/applecommander/applesingle/AppleSingle.java
new file mode 100644
index 0000000..83d9314
--- /dev/null
+++ b/src/main/java/io/github/applecommander/applesingle/AppleSingle.java
@@ -0,0 +1,235 @@
+package io.github.applecommander.applesingle;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.function.Consumer;
+
+/**
+ * Support reading of data from and AppleSingle source.
+ * Does not implement all components at this time, extend as required.
+ * All construction has been deferred to the <code>read(...)</code> or {@link #builder()} methods.
+ * <p>
+ * Currently supports entries:<br/>
+ * 1. Data Fork<br/>
+ * 2. Resource Fork<br/>
+ * 3. Real Name<br/>
+ * 11. ProDOS File Info<br/>
+ * 
+ * @see <a href="https://github.com/AppleCommander/AppleCommander/issues/20">AppleCommander issue #20</a>
+ */
+public class AppleSingle {
+	public static final int MAGIC_NUMBER = 0x0051600;
+	public static final int VERSION_NUMBER = 0x00020000;
+
+	private Map<Integer,Consumer<byte[]>> entryConsumers = new HashMap<>();
+	{
+		entryConsumers.put(1, this::setDataFork);
+		entryConsumers.put(2, this::setResourceFork);
+		entryConsumers.put(3, this::setRealName);
+		entryConsumers.put(11, this::setProdosFileInfo);
+	}
+	
+	private byte[] dataFork;
+	private byte[] resourceFork;
+	private String realName;
+	private ProdosFileInfo prodosFileInfo = ProdosFileInfo.standardBIN();
+
+	private AppleSingle() {
+		// Allow Builder construction
+	}
+	private AppleSingle(byte[] data) throws IOException {
+		ByteBuffer buffer = ByteBuffer.wrap(data)
+				.order(ByteOrder.BIG_ENDIAN)
+				.asReadOnlyBuffer();
+		required(buffer, MAGIC_NUMBER, "Not an AppleSingle file - magic number does not match.");
+		required(buffer, VERSION_NUMBER, "Only AppleSingle version 2 supported.");
+		buffer.position(buffer.position() + 16);	// Skip filler
+		int entries = buffer.getShort();
+		for (int i = 0; i < entries; i++) {
+			int entryId = buffer.getInt();
+			int offset = buffer.getInt();
+			int length = buffer.getInt();
+			buffer.mark();
+			buffer.position(offset);
+			byte[] entryData = new byte[length];
+			buffer.get(entryData);
+			// Defer to the proper set method or crash if we don't support that type of entry
+			Optional.of(entryConsumers.get(entryId))
+				.orElseThrow(() -> new IOException(String.format("Unknown entry type of %04X", entryId)))
+				.accept(entryData);
+			buffer.reset();
+		}
+	}
+	private void required(ByteBuffer buffer, int expected, String message) throws IOException {
+		int actual = buffer.getInt();
+		if (actual != expected) {
+			throw new IOException(String.format("%s  Expected 0x%08x but read 0x%08x.", message, expected, actual));
+		}
+	}
+	private void setDataFork(byte[] entryData) {
+		this.dataFork = entryData;
+	}
+	private void setResourceFork(byte[] entryData) {
+		this.resourceFork = entryData;
+	}
+	private void setRealName(byte[] entryData) {
+		for (int i=0; i<entryData.length; i++) {
+			entryData[i] = (byte)(entryData[i] & 0x7f);
+		}
+		this.realName = new String(entryData);
+	}
+	private void setProdosFileInfo(byte[] entryData) {
+		ByteBuffer infoData = ByteBuffer.wrap(entryData)
+				.order(ByteOrder.BIG_ENDIAN)
+				.asReadOnlyBuffer();
+		int access = infoData.getShort();
+		int fileType = infoData.getShort();
+		int auxType = infoData.getInt();
+		this.prodosFileInfo = new ProdosFileInfo(access, fileType, auxType);
+	}
+	
+	public byte[] getDataFork() {
+		return dataFork;
+	}
+	public byte[] getResourceFork() {
+		return resourceFork;
+	}
+	public String getRealName() {
+		return realName;
+	}
+	public ProdosFileInfo getProdosFileInfo() {
+		return prodosFileInfo;
+	}
+	
+	public void save(OutputStream outputStream) throws IOException {
+		// Support real name, prodos file info, resource fork (if present), data fork (assumed)
+		final boolean hasResourceFork = resourceFork == null ? false : true;
+		final int entries = 3 + (hasResourceFork ? 1 : 0);
+
+		int realNameOffset = 26 + (12 * entries);;
+		int prodosFileInfoOffset = realNameOffset + realName.length();
+		int resourceForkOffset = prodosFileInfoOffset + 8;
+		int dataForkOffset = resourceForkOffset + (hasResourceFork ? resourceFork.length : 0);
+		
+		writeFileHeader(outputStream);
+		writeHeader(outputStream, 3, realNameOffset, realName.length());
+		writeHeader(outputStream, 11, prodosFileInfoOffset, 8);
+		if (hasResourceFork) writeHeader(outputStream, 2, resourceForkOffset, resourceFork.length);
+		writeHeader(outputStream, 1, dataForkOffset, dataFork.length);
+		
+		writeRealName(outputStream);
+		writeProdosFileInfo(outputStream);
+		if (hasResourceFork) writeResourceFork(outputStream);
+		writeDataFork(outputStream);
+	}
+	public void save(File file) throws IOException {
+		try (FileOutputStream outputStream = new FileOutputStream(file)) {
+			save(outputStream);
+		}
+	}
+	public void save(Path path) throws IOException {
+		try (OutputStream outputStream = Files.newOutputStream(path)) {
+			save(outputStream);
+		}
+	}
+	
+	private void writeFileHeader(OutputStream outputStream) throws IOException {
+		ByteBuffer buf = ByteBuffer.allocate(24).order(ByteOrder.BIG_ENDIAN);
+		buf.putLong(MAGIC_NUMBER);
+		buf.putLong(VERSION_NUMBER);
+		outputStream.write(buf.array());
+	}
+	private void writeHeader(OutputStream outputStream, int entryId, int offset, int length) throws IOException {
+		ByteBuffer buf = ByteBuffer.allocate(12).order(ByteOrder.BIG_ENDIAN);
+		buf.putLong(entryId);
+		buf.putLong(offset);
+		buf.putLong(length);
+		outputStream.write(buf.array());
+	}
+	private void writeRealName(OutputStream outputStream) throws IOException {
+		outputStream.write(realName.getBytes());
+	}
+	private void writeProdosFileInfo(OutputStream outputStream) throws IOException {
+		ByteBuffer buf = ByteBuffer.allocate(8).order(ByteOrder.BIG_ENDIAN);
+		buf.putShort((short)prodosFileInfo.access);
+		buf.putShort((short)prodosFileInfo.fileType);
+		buf.putLong(prodosFileInfo.fileType);
+		outputStream.write(buf.array());
+	}
+	private void writeResourceFork(OutputStream outputStream) throws IOException {
+		outputStream.write(resourceFork);
+	}
+	private void writeDataFork(OutputStream outputStream) throws IOException {
+		outputStream.write(dataFork);
+	}
+
+	public static AppleSingle read(InputStream inputStream) throws IOException {
+		ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+		while (true) {
+			byte[] buf = new byte[1024];
+			int len = inputStream.read(buf);
+			if (len == -1) break;
+			outputStream.write(buf, 0, len);
+		}
+		outputStream.flush();
+		return read(outputStream.toByteArray());
+	}
+	public static AppleSingle read(File file) throws IOException {
+		Objects.requireNonNull(file);
+		return read(file.toPath());
+	}
+	public static AppleSingle read(Path path) throws IOException {
+		Objects.requireNonNull(path);
+		return new AppleSingle(Files.readAllBytes(path));
+	}
+	public static AppleSingle read(byte[] data) throws IOException {
+		Objects.requireNonNull(data);
+		return new AppleSingle(data);
+	}
+	
+	public static Builder builder() {
+		return new Builder();
+	}
+	public static class Builder {
+		private AppleSingle as = new AppleSingle();
+		public Builder realName(String realName) {
+			as.realName = realName;
+			return this;
+		}
+		public Builder dataFork(byte[] dataFork) {
+			as.dataFork = dataFork;
+			return this;
+		}
+		public Builder resourceFork(byte[] resourceFork) {
+			as.resourceFork = resourceFork;
+			return this;
+		}
+		public Builder access(int access) {
+			as.prodosFileInfo.access = access;
+			return this;
+		}
+		public Builder fileType(int fileType) {
+			as.prodosFileInfo.fileType = fileType;
+			return this;
+		}
+		public Builder auxType(int auxType) {
+			as.prodosFileInfo.auxType = auxType;
+			return this;
+		}
+		public AppleSingle build() {
+			return as;
+		}
+	}
+}
diff --git a/src/main/java/io/github/applecommander/applesingle/ProdosFileInfo.java b/src/main/java/io/github/applecommander/applesingle/ProdosFileInfo.java
new file mode 100644
index 0000000..1a516fa
--- /dev/null
+++ b/src/main/java/io/github/applecommander/applesingle/ProdosFileInfo.java
@@ -0,0 +1,35 @@
+package io.github.applecommander.applesingle;
+
+import io.github.applecommander.applesingle.AppleSingle.Builder;
+
+/**
+ * A simple ProDOS File Info wrapper class.
+ * <p>
+ * Note 1: {@link #standardBIN()} can be used to generate sensible defaults.<br/>
+ * Note 2: Fields are package-private to allow {@link Builder} to have direct access.<br/>
+ */
+public class ProdosFileInfo {
+	int access;
+	int fileType;
+	int auxType;
+	
+	public static ProdosFileInfo standardBIN() {
+		return new ProdosFileInfo(0xc3, 0x04, 0x000);
+	}
+	
+	public ProdosFileInfo(int access, int fileType, int auxType) {
+		this.access = access;
+		this.fileType = fileType;
+		this.auxType = auxType;
+	}
+	
+	public int getAccess() {
+		return access;
+	}
+	public int getFileType() {
+		return fileType;
+	}
+	public int getAuxType() {
+		return auxType;
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/io/github/applecommander/applesingle/package-info.java b/src/main/java/io/github/applecommander/applesingle/package-info.java
new file mode 100644
index 0000000..fde1de2
--- /dev/null
+++ b/src/main/java/io/github/applecommander/applesingle/package-info.java
@@ -0,0 +1 @@
+package io.github.applecommander.applesingle;
\ No newline at end of file