Avid Steam users and otherwise enthusiastic indie game players are well-acquainted with the Humble Indie Bundle , a semi-annual drive offering collections of independently released computer games for direct download, free of digital rights management (DRM). Two of these bundle drives have been completed thus far, raising over $1.25 million and $1.8 million in sales, respectively.The third bundle drive is currently underway. and has already broken the $1 million mark. This is quite an impressive accomplishment, considering that customers are allowed to pay what they want for the entire package. Those that donate more than one cent (which is greeted with an image of a homeless-looking indie developer with a donation sign) are allowed to split their donation between the developers, the bundle organizers, Penny Arcade's Child's Play charity, and the Electronic Frontier Foundation ( EFF ).While the bundles have done extremely well in the past, it seems that Windows users have repeatedly been the most reluctant to fork over their money: currently, with an average purchase price of $4.78, Windows users average $3.80, followed by Mac users with $6.61 and Linux users with $11.64, matching trends for the past two drives. Windows users do, however, account for the most money contributed.The current bundle comes with the games And Yet It Moves, Cogs, Crayon Physics Deluxe, Hammerfight, and VVVVVV, as well as a bonus sixth game, Steel Storm, that has been added since the first few days of the drive. Purchasers will also have access to the paid version of Minecraft until August 14, and those that spend more than $4.94 (at time of writing) will also get all of the games from the last bundle. Steam codes are included for those looking to add the games to their Steam libraries.The bundle will be available for another six days, so those looking to get in on a good deal while supporting indie developers and/or charities still have some time to do so... hopefully for a little more than $3.80.