commandcar is a CLI tool that can easily communicate with any API. It simplifies unreadable and complicated curl commands, and has some nice features to make automation of API calls much simpler and bash scripts more streamlined.
#cli
jakubroztocil/httpie
HTTPie is a command line HTTP client, a user-friendly cURL replacement. http://httpie.org
Terminal Tricks for Mac
Big collection of Terminal tips, tricks etc for Mac OSX.
googlecl
Access/work with Google services via command line.
WordPress bash functions
Nice collection of CLI shortcuts and bash commands to making working with WordPress code easier. From Andrew Nacin
WordPress Console
“Once activated, the plugin adds a “Console” page to the administrator’s “Tools” menu. This page includes a JavaScript-based interactive shell which loads the WordPress environment. It allows execution of arbitrary PHP code as well as anything defined by WordPress or activated plugins. This is awesome.”