Code.gov - Share & reuse open source code from the Federal Government
codepad - Very simple webpage with a simple textbox, a checkbox for selecting one of several languages and an...
CodeMyUI - Handpicked code snippets you can use in your web projects
Betterer - Improve your codebase, incrementally
Marmoset - Create gorgeous code snapshots.
CopyCoding - Machine learning and data science online community