I had tried Weblist when it first came-out, but found it pretty “buggy.”
It basically allows you to — without registration — add a bunch of web addresses and have them appear as thumbnail images in a group. Each group has one url address. You can give the group a title and description.
Sharon has written a detailed post about Weblist that includes screenshots, and I’d encourage you to check it out.
It’s quite similar to several other applications I include in The Best Places To Create (And Find) Internet Scavenger Hunts & Webquests and in The Best Ways To Shorten URL Addresses and, right now, I don’t think it stands-out among them.
However, the site’s creator says he’s going to be adding several new features, including the ability to easily add a description to each of the thumbnails. Assuming he follows through, I’m going to add the site now to those two lists (just so I don’t forget). If and when those improvements are made, I’ll also probably add it to The Best Social Bookmarking Applications For English Language Learners & Other Students.