If you want to uncover more merchants who partner directly with affiliates, just keep your eyes open. When you see affiliate links, do a quick search to see if the related merchant runs their own program. (We came up with the list above by reviewing a few of the bigger affiliate marketing blogs and investigating the most prominent affiliate links on those sites.)
SkimLinks works very similarly to VigLinks in that it is designed for bloggers who don’t want to do a lot of hands-on work to participate in an affiliate program. SkimLinks also works much like VigLinks in that it uses a plugin or script to create dynamic links in your content to send visitors to higher paying offers from merchants. SkimLinks claims to work with over 24,000 merchants/advertisers.