Polly.JS : Polly.JS is a standalone, framework-agnostic JavaScript library that enables recording, replaying, and stubbing HTTP interactions.
Polly taps into nat...
testify : Go code (golang) set of packages that provide many tools for testifying that your code will behave as you intend.
Mockbin : Mockbin allows you to generate custom endpoints to test, mock, and track HTTP requests & responses between libraries, sockets and APIs.
ghost.py : ghost.py is a webkit web client written in python.
Vcr : Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.