There are 2 repositories under 65816-assembly topic.
Source code recreation for the game Earthbound
Super Action Square is the most anticipated up and coming title of the critically acclaimed Action Square franchise.
SNES Cream Demo
A simple 6502/65C02/65816 cross-assembler with symbol and macro support.
My workspace for all my public SMW patches.
This repo is the main home for WDC's project code for it's line Boards including the W65C02SXB, W65C816SXB, W65C134SXB, W65C265SXB, MENSCH Microcomputer (W65C265QBX), and MyMENSCH