This gem automagically prepares complete URIs for Gravatar, for both avatars and profiles, with all currently supported options (except for the XML-RPC API as of 2014-03-02), starting from a single email address! It's my first 'real' Ruby gem, hoping it will be useful for someone (let me know if you use it, please!). GNU GPLv3 license; source code available through anonymous checkout: hg clone http://hg.savannah.nongnu.org/hgweb/gravaty/ or write me and I'll send it. You can even decide to contribute to this little free software project by registering to Savannah and ask to be part of the 'gravaty' project! With contributions from: 新部裕, Peter R. Marreck, Jon Maken, Łukasz Niemier.