Cave Story Noitu Love 1&2 Minecraft La Mulana (good but brutal) Bit Trip Beat Audiosurf AaAaAA!!!- A Reckless Disregard for Gravity I'll add more once I remember them.
Mine's an RMXP RPG called Master of the Wind. It's extremely well done by a small team who really love their RPGs and aim to make the best game they can: Master of the Wind RMXP If you're a fan of SNES era RPGs like Final Fantasy IV or VI you'll probably feel right at home.