updatechecker
There are 3 repositories under updatechecker topic.
mfnalex/Spigot-UpdateChecker
UpdateChecker for your Spigot plugins with only one line of code needed in your plugin!
obsti8383/UpdateChecker
Checks for software release states on Windows systems using http://vergrabber.kingu.pl/
darwinlouistoledo/RxUpdateChecker
A library that will check for an update of an app from Google PlayStore with the use of RxAndroid and RxJava.