• Arduino - Open source electronics hardware platform
  • Atom - Open Source hackable text editor. If you like SublimeText you will probably like Atom. Uses a browser-based presentation layer so display themes are built with css. Lots of plugins and community support.
  • Git - Who doesn't like Git
  • Jenkins - Open source automation and Continuous Integration server
  • Python - I hope you have a good vet because this programming language is sick
  • Thingaverse - Open source designs for 3D Printing
  • Ubuntu - Debian-based GNU/Linux
  • Vim - For old-fashioned text editing
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