Fritzing is an open-source initiative that allows you to virtually design electronic circuits on a breadboard (although you could design circuits that aren't on a breadboard). This could save a lot of hours working on a breadboard if you have this amazing software at hand. In this new version of Fritzing a high-level summary of changes are:

• New basic parts: resonator, tantalum caps, multilayer caps, zener diode, schottky diode;
• New microcontroller parts: Wiring (incl. Mini and USB Adapter), Parallax Propeller, Parallax Basic Stamps;
• SMD footprint support (though still single-sided);
• Import of gEDA footprints (through parts editor, plus 1,000 converted footprints available in parts/svg/contrib/pcb);
• Speed-ups in breadboard dragging and inspector;
• Visual distinction of plurals in parts bin;
• Layers palette;
• Mouse wheel can be set to either scroll or zoom.

But if you're interested in the detailed changes, take a look at the individual code changes clicking here.

Toped is a cross-platform IC layout editor supporting GDS and CIF formats. It is an open source project licensed under the GNU General Public License. The project is under active development. Toped focuses on rendering speed and quality of the screen output. The project uses the full power of OpenGL in terms of speed as well as unrestricted number of colors and fill patterns. In this new release (0.9.6, revision 1452) here is some changes:

ParaView is an open-source, multi-platform application designed to visualize data sets of size varying from small to very large, structured and unstructured, time varying and static. The goals of the ParaView project include developing an open-source, multi-platform visualization application that support distributed computational models to process large data sets. It has an open, flexible, and intuitive user interface. Furthermore, ParaView is built on an extensible architecture based on open standards. ParaView runs on distributed and shared memory parallel as well as single processor systems. The binaries and sources are available for download from the ParaView website. This release of Paraview includes several new features along with plenty of bug fixes addressing a multitude of usability and stability issues including those affecting parallel volume rendering and has many GUI usability improvements including, but definitely not limited to:

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 fidocadj04112010 (work in progress for 0.23.3) of FidoCadJ is out. Here are the new features and improvements:

Maxima is a symbolic computation program. It is full featured, doing symbolic manipulation of polynomials, matrices, rational functions, integration, Todd-coxeter, graphing, bigfloats. Maxima has a symbolic debugger source level debugger for maxima code. A new version, 5.21.0 stable, has been released. Some changes;