In that case...

http://www.greenmangaming.com
http://www.gog.com
http://www.humblebundle.com

And I assume you know about Origin and uPlay? (Horrible IMHO)

http://www.origin.com/en-au/store/on-the-house

Plants vs Zombies is currently free.

Don't forget to check places like Gamersgate.com, Desura.com, Gamefly, Gamestop... Heck even ebay, amongst others for the cheapest deal.
Basically if you buy a game at full price you're doing it wrong. :P
There is FAR more competition between video game vendors in the PC space to drive prices down.
Also, save penny's for the inevitable Steam sale. :P

And a list of free games:
http://forums.steampowered.com/forums/showthread.php?t=851573
http://www.origin.com/en-au/store/shop/free
http://uplay.ubi.com/en-GB/free-to-play
http://www.thefreebundle.com
http://www.gog.com/games##price=free

Go find the steam thread and be busy adding people, why should we add you when you are the one asking.

@Permalite: C'mon, don't be so rude with him

I'll add you later, my username is in my sig.

origin sux. and i bought games from the humble store spring sale and the previous humble co-op bundle

JEMC said: @Permalite: C'mon, don't be so rude with him I'll add you later, my username is in my sig.

dont worry i added you just accept!

JEMC said: @Permalite: C'mon, don't be so rude with him I'll add you later, my username is in my sig.

I'm not? o.o
I'm being my charming self. :P

Pemalite said: JEMC said: @Permalite: C'mon, don't be so rude with him I'll add you later, my username is in my sig. I'm not? o.o I'm being my charming self. :P

I know, but telling him that he doesn't have enough games and then post a bunch of links can be a bit, rude so to speak.

But it's your personal charm .

JEMC said: Pemalite said: JEMC said: @Permalite: C'mon, don't be so rude with him I'll add you later, my username is in my sig. I'm not? o.o I'm being my charming self. :P I know, but telling him that he doesn't have enough games and then post a bunch of links can be a bit, rude so to speak. But it's your personal charm .

Tons of them were free though! :P

Pemalite said: JEMC said: Pemalite said: JEMC said: @Permalite: C'mon, don't be so rude with him I'll add you later, my username is in my sig. I'm not? o.o I'm being my charming self. :P I know, but telling him that he doesn't have enough games and then post a bunch of links can be a bit, rude so to speak. But it's your personal charm . Tons of them were free though! :P

but free games suck

aviggo77 said: JEMC said: @Permalite: C'mon, don't be so rude with him I'll add you later, my username is in my sig. dont worry i added you just accept!

Done.