Rename Email - Easily change the subject of any email, by cloudHQ
Healcomputer - E-commerce technology site + computer related articles + product reviews.
DeepMail - Diligently sourced emails. Accurate emails for Startups and established companies
IdiotBuy - Great list of awesome stuff to buy online.
TestSubject - Test how your email subject line displays on mobile devices.
Awesome Stuff To Buy - Huge list of awesome stuff to buy online, if you're looking for cool things to buy this is for you, including gadgets and unique products from sites like Amazon.