Programming languages:
C/C++, Cuda C
Python, Ruby, Bash, R, Scala
MATLAB/Simulink, Octave, Mathcad
VHDL
Operating Systems:
Linux (preferred), Windows
GNU tools:
make, gcc, gdb
Text typesetting:
vim, LaTeX, MS Office if required
3D-modelling:
OpenSCAD, Blender
Bugtracking systems:
redmine (configuration, installation & maintenance)
PAAS, IAAS:
Heroku, Amazon EC2, S3
Web:
HTML, CSS, XML
WordPress (this site is running)
Ruby on Rails (familiar but not a guru)
Version Control Systems:
git, hg
Robotic frameworks:
ROS
IDEs:
Eclipse, Vivado