IndieGala, a PC game store, runs a Freebies section that adds a new free game every week, mostly indie titles, which are DRM-free downloads.

Visit freebies.indiegala.com, pick a game and claim or download it. Logging in to a free IndieGala account may be needed to claim.

The freebies cost nothing. Each title is only on offer for a limited time, so check back weekly for new ones.