Check out these twitter apps products:

Twitter Rockstar
Authoritative guide to marketing your brand or niche with Twitter. 11 Video’s, 4 PDF’s, 2 mindmaps, and a 20 minute audio session, all conveniently located in a members area for viewing or download. The most comprehensive Twitter guide on the internet.
Twitter Rockstar

How To Create iPhone Apps With No Programming Experience
Discover how to create iPhone apps easily with no programming experienced required. Learn from some of the top iPhone app developers to get your app created now.
How To Create iPhone Apps With No Programming Experience