You can see the custom version number both in the window title and towards the bottom left
VersionChanger allows modifying the displayed minecraft version with a simple config file.
Any normal text is supported, not just numbers.
Please note that some mods may also read the version and give strange output.
Config menus for resource packs
Closes minecraft when you die/take damage
A library for my mods
Apply substitutions (katakana, hiragana, owo, ...) to chat messages