Schematic entry and PCB Layout in Eagle which i use for over 10 years now. Generation of a Gerber-Files from the layout, ready to use in PCB production.
Programming of PIC microcontrollers, mainly the PIC18 series, in C and assembly. C compilers used are the open-source SDCC as well as the proprietary MCC18 compiler from Microchip. Using PIC micro's for over 6 years now.
Knowledge of ARM based microcontrollers (especially the LPC series from NXP) using tge GCC compiler.
Programming of PC based tools to control and communicate with