Groupees is far from the most well known of bundle providers, but they keep trucking all the same. Last night they started up their Digital Tribe Bundle which includes a handful of games. In case you weren't aware, Digital Tribe references the developer of the same name who created games such as Velvet Assassin and Stronghold 3: Gold.
Here's the set of games you can get if you spend $1:
Monster Madness (Windows 32-bit)
Roogoo (Windows: Steam)
Section 8 (Windows: Steam)
The second tier costs $3 and gives two more games, including the one from Digital Tribe:
Cargo Commander (Windows, Mac, Steam)
Hotel Giant 2 (Windows: Steam)
Although some of the games don't look particularly appealing, Cargo Commander is a steal at $3. In comparison, it regularly costs $10 on Steam. Initially, Cargo Commander keys were not working, but the issue has since been sorted out. If you bought early and are receiving an error with the Steam key, then email email@example.com.
Here is a trailer to give you a taste of the bundled games: