regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
SDF Public Access UNIX System : The Super Dimension Fortress is a networked community of free software authors, teachers, librarians, students, researchers, hobbyists, computer enthu...
Git Common-Flow : Common-Flow is an attempt to gather a sensible selection of the most common usage patterns of git into a single and concise specification. It is based...
TraceKit : Not all browsers support stack traces on error objects, but TraceKit squeezes out as much useful information as possible and normalizes it.
Gophercises : FREE coding exercises for budding gophers
