Sage is an open source mathematics computing environment (MCE) which covers many aspects of mathematics, e.g. algebra, calculus, elementary to very advanced number theory, cryptography, numerical computation, group theory and so on. Sage 4.4.1 has been released. In this version a total of 69 new functions were added since version 4.4 increaseing doctest coverage by 0.2%, then the total number of functions is now at 25475 (overall weighted coverage score: 81.7%). Some changes in this release are:

• Update lcalc to the new upstream 1.23;
• Bug in quadratic field embedding into QQbar;
• Update PARI to 2.3.5;
• Update pynac to 0.1.12;
• Fix riemann.pyx numerical noise issues on t2 (etc.);
• Add "Group Theory and Sage: A Primer" to the classification "Thematic Tutorials".

Sage 4.4.1 closed 55 tickets, all of which are available here for your reading pleasure.

FidoCadJ is a free and open source, multiplatform drawing program dedicated to electronics. Schematics and PCB can be easily traced and represented by a very compact text format, easy to embed in a newsgroup post. Drawings can be exported in a multitude of graphic formats, included pdf. Version fidocadj05082010 (work in progress version 0.23.3 rc1) of FidoCadJ is out. Here are the new features and improvements:

Glade (Gds, Lef And Def Editor) is a freeware IC layout editor capable of reading GDS2, OASIS, LEF and DEF. It's distributed under freeware license. This new version of Glade (4.1.14) fixes various bugs and there are some improvements. The latest version, 4.1.14, has had work done on the extraction commands, e.g.:

Fityk is nonlinear curve-fitting and data analysis software. It allows data visualization, separation of overlapping peaks, and least squares fitting using standard Levenberg-Marquardt algorithm, a genetic algorithm, or Nelder-Mead simplex method. It knows about many functions (mostly bell-shaped, like Gaussian, Loretzian, Pearson 7, Voigt, Pseudo-Voigt, and Doniach-Sunjic) and user-defined functions can be easily added. It also enables background substracting, data calibration, and task automation with a simple script language. It is being developed to analyze powder diffraction patterns, but is also used in chromatography, photoluminescence, infrared, and Raman spectroscopy, and can be used to fit analytical functions to any kind of data. In this new release of Fityk;

RealTime Application Interface (RTAI) lets you write applications with strict timing constraints for GNU/Linux operating system. Version 3.8.1 has been released. Main differences between 3.8 and 3.8.1 are in the substantial updates to RTAI-Lab and various fixes e.g.;

Xenomai is a real-time development framework cooperating with the Linux kernel, in order to provide a pervasive, interface-agnostic, hard real-time support to user-space applications, seamlessly integrated into the GNU/Linux environment. In this new version of Xenomai (2.5.3), here is some of optimizations, cleanups, improvements and bug fixes:

For detailed commit logs, see git shortlog.