One slider covers 43,252,003,274,489,856,000 cube permutations, and another hands you the window seat of any plane or satellite currently above you. A third puts a whole four-city time comparison in the address bar; the fourth just lets you watch a B-tree split.
A scroll bar with 43 quintillion stops on it
→ everycube.alen.is
Pick any plane or satellite overhead and take its window seat
→ stowaway.live
Watch a B-tree split while you read about B-trees
→ david-g-3654.github.io