What CMS is that site running? Must-have web development tools

Have you ever wanted to know what CMS a web site is running? Typically, I would scan the source code looking for telltale signs. But I came a across a great web development tool today.

Wappalyzer is a Firefox extension that gives you quite a bit of info about a site – not just the CMS, but lots of other stuff like JavaScript frameworks, web server, and development language.

For example, if I use the extension to get info about wappalyzer.com, it tells me that the site is built with Drupal. It makes use of jQuery and Highcharts, as well as Google Analytics and Quantcast for analytics. The server runs Apache and PHP on top of Debian linux.

Within Wappalyzer's settings, you can set whether it shows up in the address bar or the add-ons bar:

There is a dizzying array of categories:

And you can also opt out of sending anonymous tracking info to the developers:

Pretty nifty. This will fit in nicely with Firebug, Web Developer Tools, PageSpeed, and YSlow as my must-have web development tools.