Looks like Tor is going to resume their Free E-book Giveaway program where, monthly, they give away a free e-book. No DRM (at least the previous e-books were DRM-free), no strings, no commitment to do anything but download and read.
Here's what they have to say about it in their latest newsletter:
More details next week--but yes, we plan to resume giving away selected e-books on Tor.com, at least one title per month. To download them you’ll need to not just visit Tor.com but register as a user; the downloads won’t be accessible until you do. Registering on the site takes maybe thirty seconds if you type particularly slowly...so Act Now, Act Without Thinking, get over to Tor.com and create yourself a user account today.
Looks like I'll be updating my list of Tor free e-books, and expect information posts about each of these new giveaways as they become available.
There's been some discussion on the benefits of Tor's program, and whether or not giving away one book leads to sales of others for that author. I'll leave such determinations and discussions up to the respective authors. I just like getting the free stuff.