Yieldex, the online ad inventory forecasting and optimization start-up, has won the second annual Amazon Web Services Start-Up Challenge. As grand prize winner, Yieldex receives US $50,000 in cash and $50,000 in AWS service credits, along with the possibility of an investment offer from Amazon. "Visibility Delivered" is Yieldex's motto; by winning perhaps the biggest web services start-up competition, they've certainly delivered visibility for themselves.
Transloadit offers media upload, modification, and storage as a service for developers who need that functionality (or, as Transloadit's homepage puts it, "geeks who run web or mobile applications") but don't want to worry about it themselves. There aren't too many moving parts to it, but they're ones a lot of applications make use of. The Transloadit API's main functions include: file upload, image resizing, video file encoding, image thumbnail creations, and file storage on Amazon S3.