Handmade Hero is an ongoing project to create a complete,
professional-quality game accompanied by videos that explain every
single line of its source code. Thanks to Andrew Peacock for
this great find.
Global Game Jam is an annual event where groups all over the world
work for 48 hours solid to write games. This page has some of the games
from the 2016 Jam.
Karl Hoernell is a programmer in Sweden who writes some very nice Java games. While
that would be worth knowing just by itself, he makes it even
better by putting them up on a beautiful website with
lots of background commentary regarding game design and technical
problems and solutions.