Letter: J
- jack-audio-connection-kit - The Jack Audio Connection Kit
- jakarta-commons-cli - Command Line Interface Library for Java
- jam - Program construction tool, similar to make
- jasper - Implementation of the JPEG-2000 standard, Part 1
- java-1.6.0-openjdk - OpenJDK Runtime Environment
- javasqlite - SQLite Java Wrapper/JDBC Driver
- jhead - Tool for displaying EXIF data embedded in JPEG images
- jigdo - Ease distribution of large files over the Internet