I don't know about the rest of the mobile applications, but the two things I can think of monetizing are SqueezeBooks and LangPop:
SqueezeBooks: how about SqueezeNews? Give me a customized, highly focused and well combed summary of a certain industry and I will subscribe. I'm in online advertising; I should come to your site, select my category and be given a long list of highly specialized sub-categories. I choose the ones I want and you aggregate all related news, monitor websites, mailinglists, google trends. Summarize articles for me, with a combination of automatic summarization + some human editing, and I should be able to submit my own feeds. Something like this, "executive intelligence review"; if you just pick one industry, you should be able to get a good chunk of the executive crowd, a highly coveted readership. Just pick ONE industry that you're passionate about and go for it. You can even review startups for potential VCs, give them the raw deal. TechCrunch and other sites are verbose and annoying because that's how they make their money. You will make your money by being succinct and brutally honest.
LangPop: Programming language comparisons are stupid. Everyone has a few favorite ones and a few he uses for "work". How about you review frameworks and libraries? This looks like more work than it's worth, but you can outsource the work to specialist programmers/columnists, each in his own domain of expertise, and do it on an ad-revenue sharing basis.
When you have the right traffic, talk to me about delivering the advertising :-)
Fair enough - I actually make my money through consulting, so what you see there is mostly this: try something, see how it goes, and then just let it sit there, or keep pushing it, iterating, depending. So far, nothing seems to have really stuck, but I don't let that deter me, I keep trying different things.
"SqueezeNews" doesn't sound like a bad idea, but I'm not sure it's my thing.
> Programming language comparisons are stupid.
But it's actually a very popular site, and the #1 in its category. And it doesn't take a great deal of effort to improve and maintain, so I do. And comparisons aren't really 'stupid' - these things matter to people.