Treat is a natural language processing framework for Ruby.

Underlock makes it dead simple to encrypt and decrypt files using public/private keys.

Scrape case citations and section headings from legal briefs in *.rtf format.

DoverToCalais allows the user to send a wide range of data sources (files & URLs) to OpenCalais and receive asynchronous responses when OpenCalais has finished processing the inputs. In addition, DoverToCalais enables the filtering of the response in order to find relevant tags and/or tag values.

If you have multiple format files like Image files(Eg. .png, .jpg, .jpeg etc.), Document files(Eg. .doc, .docx, text etc.) or PDF files and now you want to make a single PDF with all format of files, this gem will help you to compile multiple format files into single pdf.

Returns a similarity score between one or many documents against a base document (keyword comparison).

Droom is nice and clean.