Letter: J
- JSDoc-1.10.2-3.al3: Produces javadoc-style documentation from JavaScript sourcefiles
- jabberd-2.0-0.s11.11.al3: OpenSource server implementation of the Jabber protocols
- jack-audio-connection-kit-0.103.0-1.al3: The Jack Audio Connection Kit
- jack-audio-connection-kit-devel-0.103.0-1.al3: Header files for Jack
- jack-audio-connection-kit-example-clients-0.103.0-1.al3: Example clients that use Jack
- jakarta-commons-cli-1.0-6jpp_10.al3: Command Line Interface Library for Java
- jakarta-commons-cli-javadoc-1.0-6jpp_10.al3: Javadoc for jakarta-commons-cli
- jam-2.5-4.al3: Program construction tool, similar to make
- jasper-1.900.1-2.al3: Implementation of the JPEG-2000 standard, Part 1
- jasper-devel-1.900.1-2.al3: JPEG-2000 library developer files
- javastroke-0.5.1-14.al3: Optional java files
- jd-1.9.5-1.al3: A 2ch browser
- jed-0.99.18-5.al3: Fast, compact editor based on the S-Lang screen library
- jeta-1.0-1.al3: Horde Java SSH module
- jfbterm-0.4.7-10.al3: Japanese Console for Linux Frame Buffer Device
- jhead-2.7-1.al3: Tool for displaying EXIF data embedded in JPEG images
- jigdo-0.7.3-2.al3: Ease distribution of large files over the Internet
- jlint-1.21-5.al3: Java program checker
- john-1.7.0.2-3.al3: John the Ripper password cracker
- jomolhari-fonts-0.003-3.al3: Jomolhari a Bhutanese style font for Tibetan and Dzongkha
- jpgalleg-2.5-1.al3: JPEG library for the Allegro game library
- jpgalleg-devel-2.5-1.al3: Development files for jpgalleg
- jpgraph-2.1.2-2.al3: Object oriented graph drawing class library for PHP
- jpgraph-doc-2.1.2-2.al3: Documenation for jpgraph
- jrtplib-3.7.1-1.al3: JRTPLIB is an object-oriented RTP library written in C++
- jrtplib-devel-3.7.1-1.al3: Development files for JRTPLIB
- js-1.60-2.al3: JavaScript interpreter and libraries
- js-devel-1.60-2.al3: Header files, libraries and development documentation for js
- jthread-1.2.1-2.al3: JThread provides classes to make use of threads easy on different platforms
- jthread-devel-1.2.1-2.al3: Development files for JThread