Some examples on how to achieve the same goal with either of both libraries: sinon and jest. Also some of those goals achievable only by one of these tools.

Mocka - The complete testing framework for LUA and Nginx

ShopifyIQ is an e-commerce spy tool to monitor products your competitors scale

Secretly record audio and video with chromium based browsers.

Chrome Extension for Cognizant Intelligent Test Scripter

A simple module that displays DOM attributes on mouseover inside a tooltip.

Complete React application of Numspy API.

Node filesystem spies and mocks

spy and mock for simple testcase

Google Maps JS API stub to allow unit testing of components and other functionality that depends on it

A script designed to display users' most recent logins directly from WazapWeb.

Helper function to create spy object for `jest`, same as `jasmine.createSpyObj`

A logger/spy Discord bot

Mr. Hyde is a Discord selfbot (bot running on your user account) bringing you some usefull features

Lightweight user session recorder based on JSON

Tiny wrapper for spying on function calls.

Jasmine API and Angular Testing Utils

Rehearse strict behavior with testdouble.js

Transform stream for debugging stream pipelines.