A few twitter tools products I can recommend:

Electricity4Gas – Electric Car Conversion Manual
We have Proof of sales. Affiliates converting at 5% (1 in 20 visitors purchase) or better. 75% Commission. Per Sale. Big market with easy sales to be made. Affiliate tools at Http://www.electricity4gas.com/affiliates.html
Electricity4Gas – Electric Car Conversion Manual

Cichlid Keeping Guide For Home Aquarium
Brand New Affiliate Tools… With new Site Design. This ebook gives expert advice on keeping cichlid fish in the home aquarium. Constant testing to improve conversions. Excellent commission rate and a great market with enthusiastic buyers.
Cichlid Keeping Guide For Home Aquarium