- Programming, open source (C, C++)

- Linux, NixOS

- Computer networks

- RepRap 3D printers (got a RepRapPro Mendel)

Most of my open-source software is available here: https://code.google.com/p/badvpn/ . This includes:

- NCD programming language

- Tun2socks network layer proxifier

- Peer-to-peer layer 2 VPN

I'm also developing the APrinter open-source firmware for RepRap's: https://github.com/ambrop72/aprinter .