Melmicro is an open source Pro Micro drop-in replacement. It replaces the micro USB connector with a USB-C connector and also supports multiple MCU footprints.
Note: This stock of Melmicros uses the ATmega32U4-AU (TQFP) MCU instead of the ATmega32U4-MU (QFN) shown in the pictures.
Warning: the "fuse" is actually a 0Ω resistor. If you wish to have better over-current protection please replace it with an actual fuse.
If you are uncomfortable not having a proper fuse, please send me an email with your order number and I can include a fuse for you to replace the resistor. Unfortunately I cannot do any soldering on your behalf, and cannot be held liable for any damage done to the melmicro after purchase.