Lenovo Legion Toolkit (LLT) is a utility created for Lenovo Legion laptops, that allows changing a couple of features that are only available in Lenovo Vantage or Legion Zone. It is a free and open source system tweaking application that's efficient, light on system resources, advanced, comprehensive, customizable and user friendly.
Here is a screenshot to illustrate the features and user interface of this application:
SteelSeries GG
System Information Tool
HelpNDoc
Monitorian
Don't Sleep