LimboAPI, LimboFilter, LimboAuth UPDATE: Release 1.0.3
LimboAPI:
Better 1.7.x support
Fix KeepAlive
Ability to change gamemode
Overlaying the StateRegistry with Velocity's built-in to improve compatibility and performance
Small optimizations
Fixes of disconnect#RegisteredServer related bugs
26 base colors (104 real colors) added to MapPalette
Hooking into EventManager to improve compatibility and performance
LimboAuth:
New versions will be released separately from LimboAPI: https://www.spigotmc.org/resources/limboauth.99413/
BStats custom charts
/premium fixes
Database-related fixes
URL Encoding nickname to allow custom chars
Ability to set max auth duration
Drop SQLite support
LimboFilter:
New versions will be released separately from LimboAPI: https://www.spigotmc.org/resources/limbofilter.99412/
BStats custom charts
Ability to set required colors for captcha's text
Better image rendering
Ability to set max captcha-checking duration

LimboAPI 1.0.4
An API which provides Limbo (Virtual Servers) features to other Velocity plugins.