Ever wanted to know how current and past employees would rate and review companies you may be interested in applying for, or even more interestingly, what salaries people were getting?

Introducing, Glassdoor.com

It's "An inside look at companies from those who know them best. See company ratings, reviews, and salaries. Membership is free."

All you have to do is sign up by contributing a review or salary report and save your information to gain full-access.

It's pretty cool and an additional tool that can be used with services like Vault.