LemonUI is a framework for creating UI systems in Grand Theft Auto V that is compatible with SHVDN2, SHVDN3 and FiveM. It allows you to create UI Elements with a NativeUI-like style, or you can also create your own UI System from scratch via the resolution-aware classes for Text, Rectangles and Textures.
It was created as a replacement for NativeUI due to being too convoluted to develop and maintain. LemonUI retains most (if not all) of the UI Elements available in NativeUI.
To start working with LemonUI, you can follow any of the Tutorials available here on my site: