I'm a java developer since 2002 and an opensource contributor since the beginning.
My GitHub account was created mainly as a hobby for some personal projects at home. Although my whole professional career is focused on Java technologies, my GitHub projects are mainly python projects focused in some kind of media tool or automation.

Some of my own projects:

• https://github.com/ratoaq2/knowit - You can extract information from your media files
• https://github.com/ratoaq2/pgsrip - You can extract and convert graphical PGS subtitles into SRT subtitles
• https://github.com/ratoaq2/cleanit - You can clean and fix your subtitles easily

Some of nice projects that I was able to participate:

• https://github.com/Diaoul/subliminal - Created by @Diaoul, here's where I learned python and I was able to contribute with some providers like legendastv.
• https://github.com/guessit-io/guessit - I spent most of time here trying to improve it as much as I could. Very nice project with very nice architecture (@Toilal)

Some mentions from some very old work:

• Contributed to quake2 and action quake 2 community in the early years (2000-2005) with some game modifications that you can still find it here ( https://github.com/aq2-tng/aq2-tng/commit/d618d3e64c0a01ecc828fb9e3497ac2670883670 )
• Creator of the opensource binding framework genesis (in the old days 2004 in java)