HumbleBundle.com has an excellent deal going on right now.
For paying $1, you get Guacamelee on Wii U, Woah Dave! on 3DS and Mighty Switch Force on 3DS.
For paying $10, you get the above games plus Stealth Inc. 2: A Game of Clones on Wii U and SteamWorld Dig on both 3DS and Wii U.
If you pay more than the average price (currently $9.24), you also receive The Fall on Wii U, OlliOlli on both 3DS and Wii U, and Moon Chronicles on 3DS.
The Humble Nindie Bundle is presented by the Nintendo eShop is available from now until June 9th. Also, there are more games coming soon to the collection.