Easy to use and modify in-game console, based only on Unity's native UI system with in-game notifications.
Features:
* Standard log console
* Native Unity's UI
* Customizable interface
* In-game notifications
* Open source
You can customize button location by draging default button in Unity's scene or easily set your custom button. If you want, check out PortableConsoleResources for more customizable items.
Source avilable here: https://github.com/Ursanon/PortableConsole