Similar repositories list button on Gthub.com based on http://www.yasiv.com/github
// ==UserScript==
// @name Github - Similar repositories
// @namespace http://tampermonkey.net/
// @version 0.1
// @description Similar repositories list button on Gthub.com based on http://www.yasiv.com/github
// @author zerk
// @match https://github.com/*
// @grant none
// ==/UserScript==
var a = document.querySelector(".pagehead-actions");
var b = document.createElement("li");
var url = "http://www.yasiv.com/github/#/costars?q="+location.href;
b.innerHTML = "<a href="+url+" aria-label=\"Show similar repositories on http://www.yasiv.com/github\" class=\"btn btn-sm tooltipped tooltipped-s\">Similar repos</a>";
a.insertBefore(b, a.firstChild);