Since http://stillmaintained.com is, ironically, no longer maintained, here's some custom GitHub badges for your dead, stale, or frozen projects:
: https://img.shields.io/badge/maintained%3F-no!-red.svg?style=flat
: https://img.shields.io/badge/maintained%3F-seeking:_help_me!-yellow.svg?style=flat
: https://img.shields.io/badge/maintained%3F-rapidly_changing!-orange.svg?style=flat
: https://img.shields.io/badge/maintained%3F-yes!-brightgreen.svg?style=flat
: https://img.shields.io/badge/maintained%3F-feature--frozen-lightgrey.svg?style=flat
You can modify these using [Shields.