Imagine if instead of constantly switching back and forth between editing and running your code, you could see the results of your code running live as you write it? Repla is an application that shows a live preview of your code running right beside your editor, so you can tell if your program is working instantly.
Soon Repla will support REPL plugins. Programming with a REPL has a rich history (the shell itself is a form of REPL), but they've never reached their full potential. Traditionally they've required entering code at a plain command prompt, a difficult proposition for programmers today accustomed to "richer" editing environments. Repla changes all that by making the REPL accessible alongside how programmers are already the most comfortable working: Writing code in a text editor and checking it into version control.