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Merge PDFs using iText.
rails validation plugin. validates credit card numbers (via checksum).
Open Source GEDCOM viewer for Mac OS X
Forked from internetchris/awesome-usps
Submitted Description: A ruby wrapper around the various USPS APIs for generating rates, tracking information, label generation, and address checking.
Sample solutions for my "Web scraping with Python" class
WordPress plugin that adds a shortcode tag to display the most recent tweets from a specified twitter user.