Gallery-Dump.com

Adult AdWorld is a reliable program with a lot of options. They have a program for CPM (banners and popunders), raw clicks, blind clicks, textads and CPA. Payment is available with ePassporte and checks. The downside is that the user interface is a real nightmare. If you want to make changes to your account, you have to contact them by email and hope they respond.

Clicksor offer a variety of advertisements: banners, text links, inline text links, popunders, layer ads, xml search feeds, ... I used their popunder, which pays quite good.

Clicksor pays twice per month, via Check or PayPal. Very reliable, but low payout!
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AdBrite/BlackLabelAds is a Pay Per Click (PPC) site that allows you to sell advertising space on your site, at your prices. It also runs network ads, so selling your own ads is optional. They pay good, but the downside is the net-60 payment: you have to wait 60 days after earning the money before they send your check. They also have CPM banners that pay good. Check is the only payment method.

The difference between AdBrite and BlackLabelAds? BlackLabelAds is for adult sites, AdBrite is for the rest.
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