2. Meta eventsStructured, documented, powerful event emitting library for Mixpanel and other such systems
3. Swiftype RbRuby client for the Swiftype API (docs: https://swiftype.com/documentation/clients/swiftype-rb/)
4. Web server uidParse and represent UID tokens from Apache's mod_uid / nginx's ngx_http_userid_module in Ruby.