How do you analyze which libraries/tools were used in development?

Question

Computer networks

Good afternoon, 2015 is in the yard and more and more developers are trying to launch the project as soon as possible, as a result (is it this or is it a consequence of the fact that more and more people are beginning to understand that bicycles are not the best thing to do) - third-party libs begin to enter the project (here , probably more about frontend, and I mean not only js components, by libs I also mean css frameworks, analysis systems, etc.).
Are there any tools, services that allow you to determine what a given project (website) uses in itself, without meditating on the source code? For myself, I have been using the Wappalyzer browser extension for a long time, but I would like to know what others use. Or in the old fashioned way - in the source code?

Answer 1

of course the old fashioned way, brother =) Wappalyzer and others do not always see everything