Free kit software for linux

libwnck is Window Navigator Construction Kit, i.e. a library to use for writing pagers and taskslists and stuff.
libwnck isnt supported in the devel platform, which means OS vendors wont guarantee the API/ABI long-term, but authors of open source apps should feel free to use libwnck as users can always recompile against a new version. (And the API/ABI has historically changed very little, Im not changing it gratuitously or without soname increments.)
There are API docs in the source code, and API documentation can be generated by configuring --enable-gtk-doc. Also tasklist.c and pager.c make good sample code.
Whats New in 2.18.3 Stable Release:
- Fix a crash when dragging a window to somewhere like another workspace/viewport (Vincent) [#420713]
- Fix crash on multihead setups (Vincent)
- Improve a bit the drawing of the workspaces in the pager (Vincent)

Greensocs project is a development kit for producing systems on a chip using SystemC (a C++ derivative) as opposed to Verilog or VHDL.
GreenSocs mission is to encourage SystemC to be used by designers. It will do this by engineering SystemC infrastructure to compliment the capabilities developed by OSCI and commercial EDA providers, promoting and utilising academic research. The aim is to extend the use and applicability of SystemC, by co-ordinating and promoting collaboratively developed models, methods and utilities, prioritised by designers needs.
The principle benefits are:
- To lower infrastructure development, training and adoption costs.
- To enable higher degrees of IP reuse and interchange.
- To enable EDA companies to build tools in support of the standards.
GreenSocs runs a SourceForge project called the GreenSocs project. Its aims are to develop SystemC infrastructure, basic IP, patches and add on library code for eventual standardisation. The GreenSocs project is made up of a number of contributions (sub projects).
In order to facilitate the use of SystemC and the infrastructure, patches and extensions that GreenSocs develops, pre-built binary packages including all of the stable GreenSocs patches and basic building blocks are available from the downloads area.
Enhancements:
- Assorted minor updates and bugfixes.

GNU Privacy Assistant aka GPA, is a graphical user interface for the GnuPG (GNU Privacy Guard).

GPA utilizes GTK (the GIMP Tool Kit) and compiles for various platforms. You can have a look at some screenshots . You can learn more about GPA icons , as well.

Qtractor project is an Audio/MIDI multi-track sequencer application written in C++ around the Qt4 toolkit using Qt Designer.

The initial target platform will be Linux, where the Jack Audio Connection Kit (JACK) for audio, and the Advanced Linux Sound Architecture (ALSA) for MIDI, are the main infrastructures to evolve as a fairly-featured Linux Desktop Audio Workstation GUI, specially dedicated to the personal home-studio.

Chemistry Development Kit classes are Java utitility classes for ChemoInformatics and Computational chemistry, written in Java. They are developed constantly developed parallel to other projects that make use of them.
They are a complete re-write of the CompChem classes that were the basis of JChemPaint, a Java Editor for 2D chemical structures, and of JMDraw, a Java package for the graphical layout of 2D chemical structures.
The CDK project was started in September 2000 to replace the CompChem libraries used by JChemPaint, Jmol and SENECA. It no longer is in its initial stage, but is slowly getting a solid state.
The people involved in setting up the project are Christoph Steinbeck then at the Chemoinformatics Group at the Max Planck Institute of Chemical Ecology in Jena, as well as Egon Willighagen from the University of Nijmegen, The Netherlands, who is also involved with JChemPaint and many other Java Chemoinformatics programs, and Dan Gezelter from Notre Dame University, South Bend, USA, the initiator of Jmol, a 3D viewer and analyzer for molecules .
Now, the rewrite of these CompChem/CDK library classes do somehow effect all of our projects. All of our code relies to some extend on the so-called CompChem classes for computational chemistry.
Christoph Steinbeck started this chemistry library when he started programming SENECA, a system for Computer Assisted Structure Elucidation. It turned out that some of the code had design flaws that prevented others, like the authors of (Jmol) to use it.
Enhancements:
- This release consists of mostly some bugfixes, but also solves a few Java 1.4.2 compile problems and adds more functionality to the SMARTS parser.

The Object Oriented Database Kit is a set of tools to help database applications developers to handle database communication, reporting, and printing. It has a solid, stable, and easy to use API. The project is also GUI toolkit agnostic and portable.