I wrote a server manager (it became the most popular one for a while) for hosting our own Minecraft Craftbukkit multiplayer servers. It started out as a dumb batch file that made the server start script for you, but eventually became a proper manager when I learned VB.Net.

It was horrible, used way too many try-catch blocks to hide errors, was almost literally held together with tape and prayers (not joking, half the visible UI was made of white panels overlayed to hide seams between existing controls, or hide the tabs on a tab control), everything ran on the UI thread, not a single best practice convention was used and it doesn’t work on my own computer anymore, but I was proud of it.

And then Craftbukkit got DMCA’d so it died. Probably for the best