You Don't Know About These 10 Awesome Google Apps, But You Should (businessinsider.com)

There's a single-page version on the bottom right of the main post.

smartsheet looks pretty useful for hypothesizing ideas/testing (in the same way I use adwords to test things out in the wild)

I will test it out and report my findings.

EDIT - maybe not, it's returning bad requests (error 400) when I try to install it to my apps domain.