Sometimes you just need a search engine to find some data… and since every one does things differently, here’s a giant list of them:
And due credit to Wikipedia, which helped me discover many of these. Here you’ll find everything from the usual Googles and Bings to price searches, local search engines, scientific data respositories, and more. You just have to play with each one to figure out what it does. 🙂
All systems below were active as of 2017-05-23.