GitHub is an online collaboration site for developers and programmers. It is an online repository where multiple coders can commit software development changes.
Google Webmaster Tools is a great search engine optimization (SEO) resource for any web developer who's goal is to analyze and drive more traffic to their site.
Google Analytics is an extremely powerful data analytics tool for anyone who has a website. All it takes to set up is adding a small JavaScript in your webpage.
A relatively simple PHP script can be written to gather data statistics from the database, define the graph size and intervals, and plot line or bar graphs.
Dmegs is an online website directly. As the web grows at an alarming rate, Dmegs provides useful and advanced search and filtering tools to find relevant sites.
The emergence of Web 2.0 came about largely due to sites which enable and encourage User Generated Content (UGC) like forums, wikis, and social media websites.