mcuStudio is a development environment for Microcontrollers. It's based on Eclipse (plugin). The aim is to provide a high quality development environment for electronics. First editions will target Microchip Pic mcu's. Other mcu will be supported later.
SAM (Servo Actuation Manipulator) is a GTK+ based X windows application for controlling anywhere from 1 to 254(so far) servo motors via a serial port connection, specifically this program was made for the Scott Edwards Electronics Mini SSC II.
This is a Computer Aided Electronic Design tool. It features schematic capture, simulation and PCB layout for both analog and numerical componants with the help of Gnome.