@caltab: I also have links to each of the charities in to opening post if you're interested in donating to them directly (I'll provide them below too). Like you, I too have two of these games since they were offered for free at one time through Amazon's Deal of the Day promotion, but that doesn't mean everyone can get them for free now and there are plenty of people out there that may have missed out.
I can vouch from previous experience that:
*Walkabout is quite challenging and fun.
*Grisly Manor has little to no replay value, but is interesting the first play through.
Also, on the Android side of things, as far as I know, Robot 99 and Chickens Quest seem to be launching exclusively through this bundle. They both look fun as well. Float has a Free ad-supported version, the one included appears to be ad free.
I did a bit of research too in comparison to Humble Indie Bundle and the default split for charities is 30% for HiB with half of that going to
Child's Play and the other half going to the
Electronics Frontier Foundation. I think it's safe to say it didn't deviate much off that 30%.
The percentage thing could be a deal worked out with the indie devs to provide their games in the bundle. I remember reading an article about a dev that was part of the Humble Indie Bundle that spoke out about not being paid enough in their opinion. It's the world we live in, not everyone is willing to work for free, who knows if Amazon or Apple aren't taking their cut?
I couldn't find any solid numbers, but in all seriousness, I don't think
Bliss,
Child's Play, or
Dispensario de Managua will complain that they're not getting as much as they would've with the Humble Indie Bundle.
Edit:
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(does not warrant having its own post)
@caltab below: Indie Bundle promotions are a good way to get your average gamer to donate to charities. There are many people that don't donate to any charities. Don't get me wrong, it's great that you will donate to charities, but you shouldn't discourage participation in promotions such as this. At the very least, they get the word out on the existence of these charities. I honestly would've never known about the
Electronics Frontier Foundation, never heard of
Bliss or
Dispensario de Managua without these promotions. Also, besides World of Goo, which I already owned on the Wii at the time I purchased it, I haven't played any of the games from any of the Humble Bundles and I have all 5 bundles. I'm sure there are plenty of others like me too.