SeeIP Client is a wrapper for the SeeIP API, writted in Dart. It makes it easy to obtain your public IP address and other related information. This can tell you how your device is identified on websites you visit, or if your VPN is working as expected.
MetaFormat generates html meta tags, social tags for Facebook Open Graph and Twitter cards, css and JS includes, and favicon links. MetaFormat is fully customisable, allowing you to mark-up your documents in a uniformed way with the minimum of fuss.