Affiliate Resources

Affiliate Forums

General Monetization Forums

Digitalpoint Good for Adwords, Adsense and more besides.

Misc.

AffiliateBounty Promises to be a seriously good merchant locator.
Wordtracker Exact keywords used in searchs.

Desktop Software

Roboform Password protects your list of login details (among other things). A dropdown list of links with auto submit makes checking sales reports a doddle. The free version is restricted to ten form pages, so you'll want to buy the unlimited version.