The UK of Equestria is a forum and community hub for UK bronies.
I joined shortly after it's founding in decemeber 2011 and remained active during most of 2011-2014, during these year I undertook a few personal and community projects related to the site

During 2014 on the forum, I had a different line in my signature each day powered by cronjobs and bash hackery!
Each signature was archived archived until the project died around the end of Febuary 2015.

Personal project and learning exercise to create a Chrome Extension for the forum, which alerted users to new alerts, replies and messages. It also contained several easter eggs - which I am pretty sure went completely undiscovered.
The extension may no longer work

From around 2013 to 2015 I help run and host their Minecraft Server.
Though the server closed due to lack of interest and running costs, the thread about it can still be found on the forums and the world saves can still be downloaded.
The server was mostly vanilla however included a custom made pony power plug-in, findable on my github.