Here's my list. Some require a fee, some are free, some are job boards, some are gouge boards, a few are worthwhile although I only use a few of these regularly, and yes APC has a nice collection of current airline information available on our front pages.

AirlinePilotCentral
climbto350
flitejobs
fracstats
pilotjobs
avianation
willflyforfood
findapilot
uspilot (free)
avcrew (free)
avianation
findapilot
uspilot (free)
avcrew (free)
aviationemployment (free)
airjobsdaily
trade-a-plane jobs
usaviation (free)
corporatepilot
aviationinterviews ("gouge")