I have done contract electrical engineering for ages. Previously mostly for university and friends, but as time went forward, more and more professionally for companies. As I also got my own lab and couple of employees - it was time to go official. So I got involved with couple of companies.

Tech-thing OÜ - electrical design and small scale manufacturing. We have capability to design and prototype wide area of devices - from small LED devices to big motor controllers and RF circuits.

Crystalspace OÜ - nanosatellite subsystems and components.  We specialize into making small satellite components, like power supplies, attitude determination and communication systems. Also mechanical components like frames and reaction wheels. And finally - whole small satellites.