Founded a couple of open source projects, most remarkable being flamerobin.org, which is now the default administration GUI for the open-source FirebirdSQL DBMS. I got really close with people in that community (had beers with most core developers ;) and even presented some papers/sessions at three Firebird conferences. I also run the official Firebird FAQ website at firebirdfaq.org.
Wrote some shareware software available at guacosoft.com. Most successful product is a home-inventory application called Attic Manager.
From 2009 got interested into web space, but mostly kept alive by making accounting software.
In 2014, tested waters on Android, built a space shooter game Drone Invaders in just 23days: http://bigosaur.com/blog/23days
In 2018, built and released Rogue Bit, a puzzle game about computer internals. You play as a single bit of RAM who became sentient and decide to escape the computer into the real world:
Currently working on Son of a Witch, a roguelike brawler best explained as a mix of Castle Crashers and The Binding of Isaac. It's available on Steam and Nintendo Switch: