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CapGun is a service that asynchronously captures screen shots of web pages. The service has a REST and JSON based API.
NTK / Media Bot is a service that asynchronously retrieves, transforms, and publishes media. It currently supports fetching mobile phone MMS, extracting images and text from the MMS, and publishing the media to private bulletin boards. Additional retrievers, transformers, and publishers can be implemented as needed.
MMS2R: A Ruby Gem for extracting media from a MMS
MMS2R (the peepcode book): Receiving Email with Ruby PDF book
imPOSTor: A Ruby Gem for posting to non-REST-ful forums such as phpBB2, WWF 7.9 and 8.0, etc.
capgun: A Ruby Gem for for the capgun.io API