8bitDo

https://8bitdo.com
Highly regarded for quality retro controllers for a variety of consoles
Wireless receivers (albeit with limited capability) for a variety of retro consoles
https://www.8bitdo.com/usb-wireless-adapter-2 only supports Switch, SteamDeck, PC and Android as output devices
Ultimate Software (proprietary/closed source) for remapping
Only supports their own controllers as input sources

The 8bitDo Ultimate Software v2 site at https://app.8bitdo.com/Ultimate-Software-V2 claims "The 8BitDo Ultimate Software V2 comes with enhanced features such as advanced key remapping, macros, audio configuration, firmware updates and more". The software will not allow any functionality until an 8BitDo controller is connected. 8bitDo has a good name but their aim is to sell their controllers and the output support is extremely limited.