Powerline
Statusline plugin for vim with prompts for several other applications
...Originally created exclusively for vim statuslines, the project has evolved to provide statuslines in tmux and several WMs, and prompts for shells like bash/zsh and other applications. It’s simple to write renderers for any other applications that Powerline doesn’t yet support. JSON is a standardized, simple and easy to use file format that allows for easy user configuration across Powerline’s supported applications.