The Dwarf Fortress 10,000 Year Project
Alternatively called "DF10K", it is an idea to generate worlds in Dwarf Fortress with very long histories to delve into, and possibly even play them!
To find out more, go to the DF10K page.
Random Subnet Generator
Have you ever wondered why everybody seems to use 192.168.0.1 for their router? If not, this tool probably isn't for you. If you've been looking for a way to come up with random network addresses without rolling dice and mangling the results into a dotted-quad, you might just have found it!
I'm now running my own Nextcloud instance! It's invite only though, so if you don't know me, go get your own! :P