There are 2 repositories under pdp-11 topic.
All CPU and MCU documentation in one place
Using the historical unix 2.11 BSD operating system on the PiDP-11. With examples such as cool-retro-weatherstation.
UKNCBTL is emulator of Elektronika MS 0511 (UKNC), soviet computer based on two PDP-11 compatible processors.
Compiler for PDP-11, written in Python
PTAP2DXF - Generate CNC-cut paper tapes from .PTAP or other binaries on a home stencil cutting machine
This is retrospective of the formerly popular game "LAND". It was originally developed by ASP corp. in 1986 and ran under PDP-11 compatible computers.
:heart: A lisp dedicated to bnl intended for use under 2.11BSD on a PDP-11
Memory system and UART implemented on Tang Nano 20K for DEC DCJ11 PDP-11 Processor
Original Soviet Tetris as seen on TV (PDP-11(simh)/15ИЭ-00-013(mame))
Linux Qt port of one of the best BK-0010/11 emulator from http://gid.pdp-11.ru/ with some improvements. Not finished yet. Work in progress...
AncientXinu: Early Xinu / Xinu68k releases
:computer: Simulation for the architecture of a processor inspired by the ideas of PDP-11 processor
:earth_africa: A very simple and small web server for 2.11BSD, called by inetd
The Ultrix-11 3.1 source code.