I wrote to Alawar last year shortly after their last lot of game giveaways, partly to say thanks for all the free games, but also for other reasons. I was told that they had really enjoyed working with the giveaway team, but that it would be a long time before they coinsidered giving away more free games. They didn't outright say no, but I got the impression that it wasn't going to be for a long time to come. The one consolation is that Alawar do give away one game a month provided you have their game box installed. There's a post in the forums that usually keeps up to date with whatever game is available at the moment. Presently it's either one of the Snowy puzzles or Ice Puzzle Deluxe. I don't have access to my Alawar Gamebox on this computer so can't check.
Then there's another alternative. Go to Gamehouse. They give a free arcade game away every day; thought there is a downside to them in that they are add supported; also they do start to repeat after several weeks. Still, that's nearly 50 arcade games and includes some only just released:
http://www.gamehouse.com/
Todays game (31st January)is called Delicious 2. You do have to create a free account to be able to download the games, and the adverts last for around 20 seconds at a time. Each game seems to have them popping up at different times. Some seem to pop up every few levels and others only seem to pop up a couple of times every so often, though at least once each time you start playing the games.
regards
Whiterabbit