Another good resource is Steven Skiena's Stony Brook Algorithm Repository [0].
It's not immediately clear on the linked page, but the "By Language", "By Problem", "Algorithm Links" targets will drop down with links to a specific page. The "By Problem" targets link to a page that is very similar to what is in "The Hitchhiker's Guide to Algorithms" part in Skiena's "The Algorithm Design Manual" textbook. They each lead with an image representation of the input and output of the general case of the algorithm, a problem description, some short text description, and then links to implementations. It's not as detailed as what is in the textbook, and I'm not sure how up to date it is these days, but it's a good place to browse about.
I can't tell you how many times I've looked up something there over the years (complete with links to sample code!).