For less than 6 more hours, Humble Store has a flash sale on Cities in Motion 1 & 2 Collection, 75% off for €4.99. Steam-only.
Edit: Seems to have been a glitch, because the price is now €21.24.

Looks good, but it seems to lack a couple of DLCs from both games.

Indiegamestand Deal:
Glitchspace DRM Free & Steam
BTA: ~$1.38:
9.03am

Bundle Stars Intense Bundle - €3.49

Rescue Everyday Heroes US Edition
Gray Matter
Infinite Space III: Sea of Stars
Gomo
QuestRun
Adventure Park
CT Special Forces: Fire for Effect
Fortix 2
Hotel Collector's Edition
Zooloretto

http://www.bundlestars.com/all-bundles/the-intense-bundle/

Just from a glance I'm already interested in Rescue, Gray Matter, Questrun and Infinite Space III (Sequel to Weird Worlds)

This one has quite a few titles I'm interested in. Yay!

Another Humble flash sale, Natural Selection 2 for 1.99€ (reg. price 17.99) for about 7 more hours. Not personally interested, but a good deal I suppose.

Yeah... really nice bundle.
I think BS are making the best ones in the last few weeks.

YAHSFS (Yet Another Humble Store Flash Sale). This time, Crusader Kings II Collection, 85% off/€11.99 for about 7 more hours.

is it worth it?

Well, I haven't played it, but it's apparently a good one if you like Grand Strategy games. It is true, though, that the collection doesn't have all the DLCs.

I am totally NOT into (grand) strategy games but CKII is just so much fun playing and see where it goes. You cannot 'lose' this game.
I actually don't know what a 'good strategy' is but when I see what else is filed under the genre and how less it interests me, I can say CKII is my exception to the rule.

PS: and there is a big Game of Thrones-Mod for it! ;)

I am into strategy games and war games since the 80's.. A lot. For the life of me I can't find any strategy game more boring than the CK series. At least the first game. I haven't played the second yet and I don't plan to.

King's Bounty Collector's pack would have been nice if it also had DRM-free versions #bummer

NBA2K14 is historically lowest on US Amazon
http://www.amazon.com/NBA-2K14-Online-Game-Code/dp/B00D93B5VI/ref=sr_1_85_bnp_0/179-7607339-5378413?s=videogames-download&ie=UTF8&qid=1399364209&sr=1-85&tag=isthcom0a-20

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No one likes being the monsters so you'll spend most of your time as monster in the lobby waiting for an opening on the human team. XD

Hmm, not a new deal (in fact from the price history at isthereanydeal it looks like a nigh-permanent discount that simply isn't shown under the GG "on sale" tab), but I only noticed it now: X: Beyond the Frontier / X-Tension €1.75 each (50% off), DRM-free, at GamersGate.