Free computing software for linux

BOINC project lets you donate computing power to scientific research projects.
Some projects are:
- Climateprediction.net: study climate change
- Einstein@home: search for gravitational signals emitted by pulsars
- LHC@home: improve the design of the CERN LHC particle accelerator
- Predictor@home: investigate protein-related diseases
- Rosetta@home: help researchers develop cures for human diseases
- SETI@home: Look for radio evidence of extraterrestrial life
- Cell Computing biomedical research (Japanese; requires nonstandard client software)
- World Community Grid: advance our knowledge of human disease. (Requires 5.2.1 or greater)

Ch is an embeddable C/C++ interpreter for cross-platform scripting, shell programming, 2D/3D plotting, numerical computing, and embedded scripting. C/Ch/C++ allow users to use one language, anywhere and everywhere, for any programming tasks. Ch is the solution for:
- Embedded Scripting
- Enterprise
- Academic
- Plotting and Numerical Computing
C++ is C plus plus minus. Ch is C plus (Ch = C+). Ch is a C interpreter. Ch is C with classes and high-level extensions. Ch is a superset of C. Note that C++ is no longer a superset of C. For example, VLA and IEEE floating-point arithmetic in C are not supported in C++.
C is for low-level system programming and embedded systems; C++ for large-scale projects. Ch is optimal for platform-independent scripting in numerical computing and visualization, rapid application development, Web programming and plotting, embedded scripting, shell programming and integration with legacy systems.
Like C++, Ch is designed to be a superset of C, which means a C program can run in Ch without modification. Unlike C++ which is designed for serious professional programmers (elite), Ch is designed for both novice beginners with no computer experience (average Joe and John) as well as experienced programmers.

KIside is a message digest computing and displaying tool. KIside computes and shows the hash code of any file as a string of hexadecimal numbers.

KIside implements standard algorithms such as MD5, SHA1, SHA25.

Movie2XviD is a script for encoding a DVD or other movie to AVI (XviD).
Auto computing bitrate and hight quality, but it is a little slowly.
Enhancements:
- Add options
- video filter
- help
- new computing bitrate

JXTA platform is an open network computing platform designed for peer-to-peer (P2P) computing. The JXTA platform standardizes the manner in which peers:
- Discover other peers
- Advertise Peer resources (Peer, PeerGroup, Service and Pipe Advertisements)
- Communicate with each other (Pipes)
- Cooperate with each other to form secure peer groups (group membership)
The Platform project is a Java Standard Edition reference implementation of the JXTA protocols.
The Platform project was the original JXTA implementation and was built in Java, because Java enabled us to rapidly prototype and test new ideas and develop a more robust implementation.
Java is available on most client platforms (Unix, Windows, MacOS X, etc.) and allows us to reach the maximum number of potential users.