f.lux SBSettings Toggle cydia tweak allows you to toggle f.lux from SBSettings.
App Activate cydia tweak allows you to assign Activator actions to double tapping an app icon.
Here is our video review for FXOSLock cydia tweak. This is $0.99 in BigBoss repo and using it you can have a really cool iOS lockscreen slider.
Allocine for Velox cydia tweak is an addon for Velox cydia tweak for the Application Allocine.