Top 4 C++ Reprap Projects

Marlin

755 15,888 9.8 C++

Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.

Project mention: Why Prusa is floundering, and how you can avoid their fate | news.ycombinator.com | 2023-12-26

There is _a lot_ wrong with Marlin. It is a complex codebase, full with ancient artefacts, litterred with preprocessor ifdefs every 2-3 lines of code, dynamic includes in the middle of CPP files, etc[1]. It's about as unreadable as C++ code gets--well, I guess it's not template metaprogramming.
Klipper by contrast is a breeze to read through[2].
I am very grateful for Marlin, for all of reprap, and everyone who has contributed to it. But saying there is nothing wrong with it is straight up misguided.
[1]: https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/M...
[2]: https://github.com/Klipper3d/klipper/blob/master/src/lcd_hd4...

ADVi3pp

5 241 8.8 C++

ADVi3++, an alternative and better firmware for Wanhao i3 Plus printers and clones. Fork of Marlin Firmware.

Project mention: Questions about replacing printer firmware | /r/3Dprinting | 2023-11-13

I found this website which goes into a lot of detail about i3 clones, and the author links to his own firmware, ADVi3++, which is advertised for i3 clones.

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Marlin-2.0.X-MKS-Robin-Nano

4 104 0.0 C++

Marlin 2.0.X for the MKS Robin Nano 1.1/1.2
Marlin

2 40 0.0 C++

Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. | Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine. (by thisiskeithb)

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).