HIDSharp is a cross-platform .NET wrapper for Windows, MacOS, and Linux (hidraw) USB HID APIs.
It can interface with arbitrary USB HID devices as well as read and write raw reports.
It also includes cross-platform serial port communications and supports interprocess communication for...
usb-serial-for-android is a driver library for communication with Arduinos and other USB serial hardware on Android, using the Android USB Host API available on Android 3.1+.
No root access, ADK, or special kernel drivers are required; all drivers are implemented in Java. You get a raw serial port...
A cross platform library for communicating with the Satoshi Labs' Trezor Hardware Wallet. Supports Android, UWP, .NET Core and .NET Framework with Hid.Net. Support for other platforms can be added with Hid.Net dependency injection
This is a generic USB library I have had around for quite some time for handling of events and sending of byte commands to USB devices. I do not know who the original author is, but am happy to update if anyone knows.