LUL Station Name Unmatcher - type in a word or phrase, and it will tell you all of the London Underground stations whose names have no letters in common with it.
VRM Batch Parser - type in a string representing a sequence of vehicle registration numbers (for example, a batch of buses), and it will list them individually, along with shortcuts to search for photographs of each one.
Snowing script - a short script that produces the visual effect of falling snowflakes.