Have you played any of the games that are frequently given away free?

Archi's Skynet plays them

I bought Vertical Drop Heroes HD shortly after it was released because the previous free flash version was pretty fun. HD is a huge leap backwards, though.

I have five minutes in 8BitBoy. It's awful.

I tried Endorlight. It's okay, but that's mostly because it's a prepackaged "Make your own roguelike-platformer!" kit with minimal changes.

Played them all, some are good, others are not.

I played DeadBits, enjoyed it, also played Woodle Tree, although the camera sucked it was also a nice game

Woodle Trea Adventures 100%'d - it's not a terribly bad game, but the hitbox and camera settings would need a rework because sometimes you don't even see what way are you moving.
The Ship - lovely, it's a fine game :)
Vertical Drop Heroes - haven't played that much with it, but the flash version was amongst my favourite free games - eventually I'll play more with it, but it feels more complicated, at the expense of simple fun.

No. :X
Too many other good games to play.

I can say Pid is a decent game. Its review rating says the same.

a few of them, like Lucius.

The Journey down and left4dead2 two of the best freebies i ever played but besides that majority of freebies i havent yet still need to give payday the heist a serious go]

I tried Canyon Capers for i don't know, 20 mins? and then uninstalled it. Started Idlemaster and idled it for the cards.

When I had pretty much only free games, a lot yeah.

I tried Pid, it was lovely, but I couldn't reach something so I left it (tried several times since but still couldn't reach what I wanted) :p
Gun Monkeys but I didn't really like it.
Woodle Tree Adventures, it gave me headaches, I barely finished the first level and didn't touch it again until recently, it was much better (with a controller)
Dino D-Day, it's not my kind of games but I wanted to try anyway, I didn't stay long.
Victim of Xen, little RPG, I liked it.
Canyon Capers, one of my favorites at the time, nice platformer.
Afterfall InSanity, I still don't know why I tried this one, I really don't like scary games x)
Payday, it's not really my kind of games, I'm bad at these games, I don't like to be bad, I just stopped playing :p
Enclave seemed nice but I didn't continue to play after I explored some tunnels and went back to the beginning.
Uriel's Chasm, I still wondering why I clicked install on this one, just W T F.
PixelJunk Monsters Ultimate, I like TD, I still have to finish this one.
Postal, not my kind of games but I played for a bit, I don't really know what I was doing though x)
Teleglitch: Die More Edition, got stuck at the beginning without knowing what to do, never touched it again.
Nosferatu: The Wrath of Malachi, I was really in a good mood when I tried this another scary game, I don't know why I keep trying games I know I don't want to play, I'm a masochist, anyway got stuck at the first door, so I just left :D
Culling of the Cows, liked it but was unable to 100% it :(
Dysan the Shapeshifter, seemed bad but wanted to try it anyway, keeps crashing at the beginning, so... never again.
Pixel Puzzles: Japan, really liked it, jigsaws <3
Soul Gambler, Make it Indie! and The 39 Steps but it was more for achievements :x
Pixel Puzzles: UndeadZ, I wasn't expecting that, puzzle part was ok but killing part... ._.
Ubinota, nice and cute little game.
Epigenesis, liked the gameplay but didn't get really far.

Canyon Capers - It's a pretty good platform game, though a bit difficult at times.
Pixel Puzzles: Japan - It was nice playing a game with jigsaw puzzles, but I was annoyed by the puzzle pieces constantly moving around in the pond causing me to grab another piece than the one I wanted.
Enemy Mind - It's a decent space shoot em up, different from the rest. I liked that you can possess enemy ships and jump from ship to ship.
Rush Bros - The only thing I liked about it was the music.
Skyborn - I only played for an hour, but the story seems interesting and I want to find out what happens next.

I played Dead Bits as well, still have one level to beat it.
Particula is also somewhat nice.

I plan to try some of them, like Woodle Tree. What I can say is I gave Overcast - Walden and the Werewolf to a friend of mine to blindstream. It was BAD. Made for a hilarious stream, but no way in heck am I ever going to touch that one.

Two Worlds series are my favorite RPGs =D
Also tried playing Metro 2033 but couldn't enjoy it =\
Really liked Enclave!
Soul Gambler was brilliant!
Can't remember the others but I like ~30% of them =d

have completed Lucius, it's quite good actually but it contains so many bugs, which disappointed me.

played Brilliant Bob and Power-Up, passed a few levels.

haven't play the other yet, but will do in the future.

Enclave , beaten it up twice ;_