A zealous advocate of
free (as opposed to proprietary) software.
The freetard's entire identity is based around using
free and open source software such as Linux, and he spends every waking hour of every day writing self-serving propaganda as to why he is superior to anyone who uses software whose licensing does not allow you to reverse engineer/copy/modify and then release your own version of somebody else's
work.
"Hey guys, can you help me get this
game installed on Windows 10?"
"You use Micro$oft
Windows? Don't you know that software doesn't
respect your freedoms? You should use GNU/Linux like me! BTW, I use Arch."
"Oh great, here come the freetards to derail the thread."