Val Town is a social website to write and run code. Vals are small JavaScript/TypeScript snippets that run on their servers. You can create APIs, scheduled functions, email yourself, and persist small pieces of data — all from the browser.

Yet another Go REPL that works nicely.

A runtime developer console, interactive debugger and REPL for PHP. PsySH can be used as an interactive debugger, much like JavaScript's debugger statement, saving you from endless var_dump() and die() iterations.