Freedom Planet, Screencheat and Coin Crypt are the new additions, and will be available to anyone paying more than the average price of (as of writing) $5.24.
What of the games themselves? Our editor, Samuel, is a big advocate of Freedom Planet—comparing it favourably to the Sonic games of old. Shaun, meanwhile, seemed to enjoy Screencheat—a four-player splitscreen shooter in which you must look at your opponent's corner of the screen to work out where they are. Coin Crypt, alas, doesn't have an on-team advocate. It appears to be a procedurally generated adventure game.
The Humble Jumbo Bundle will run until Tuesday, August 4. Proceeds are split between the developers, Humble, and this bundle's two charities, Save The Children and charity:water.