The Jasmin software distribution includes an implementation of the Script MIB according to RFC 2592 with a Java runtime engine, a selection of demonstration scripts, a Java package called "scriptmib" supporting the development of manager applications for the Script MIB, Smurf, a graphical user interface to the Script MIB, and JAX, a Java package for building AgentX sub-agents.
JERED is a very easy-to-use C/C++ text editor for *NIX which provides C/C++ syntax color highlighting. Help is always on the screen, many-user configurable settings are available, and the user interface can be viewed in English, French, Finnish, Spanish or Russian (using the KOI-8 font).
JFwadmin is a Java 2 high-level X11 tool for ipchains. The GUI displays easy-to-understand services. Features include scripts generation, firewall save and restore, automatic interface and IP address and routes detection, current firewall configuration display, and handling of masq-modules and port-forwarding.
Jhead is a command line driven utility for extracting digital camera settings from the Exif format files used by many digital cameras. It handles the various confusing ways these can be expressed, and displays them as F-stop, shutter speed, etc. It is also able to reduce the size of digital camera JPEGs without loss of information, by deleting integral thumbnails that digital cameras put into the Exif header. If you need to add Exif support to a program, this is a simple program to cut and paste from. Many projects, including PHP, have reused code from this utility.
JIGS (Java Interface for GnuStep) allows Java programmers to use the GNUstep libraries from Java, but it is more than a set of bindings for GNUstep from Java: it takes advantage of the fact that Objective-C and Java are very similar languages to make it possible to use Objective-C classes from Java using exactly the same API (and vice versa). Moreover, JIGS can generate automatically wrappers for your own Objective-C GNUstep libraries.
Jmol is a Free, Open Source molecule viewer and editor. It is a collaboratively developed visualization and measurement tool for chemical scientists. Jmol is an active project, and there are new features being added to it on a daily basis. Users are encouraged to modify it to fit their needs and to contribute their changes to the project.