Top 5 C++ AAX Projects

JUCE

104 6,073 9.5 C++

JUCE is an open-source cross-platform C++ application framework for desktop and mobile applications, including VST, VST3, AU, AUv3, LV2 and AAX audio plug-ins.

Project mention: Anyone know anyone that creates plugins? | /r/audioengineering | 2023-12-08

Check out https://juce.com in the meantime
sonobus

68 1,405 8.3 C++

Source code for SonoBus, a real-time network audio streaming collaboration tool.

Project mention: Voicemeeter Banana Replacement in Linux | /r/linuxaudio | 2023-12-08

Sounds like you could use https://sonobus.net/ and possibly https://vdo.ninja/ but you might have that already covered with jitsi.
InfluxDB

www.influxdata.com
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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.
audiogridder

20 717 1.9 C++

DSP servers using general purpose computers and networks

Project mention: Pro Tools Native/Rosetta container. | /r/protools | 2023-12-11
Vaporizer2

4 378 9.4 C++

Vaporizer2 hybrid wavetable additive / subtractive VST / AU / AAX synthesizer / sampler workstation plugin

Project mention: Vaporizer synth released .linux version. Vst Lv2 Standalone | /r/linuxaudio | 2023-12-04
PolarDesigner

1 31 8.7 C++

Plug-in allowing you to control the polar pattern of your OC818 microphone in up to five frequency bands. Developed by Simon, Thomas, IEM, and AA.
WorkOS

workos.com
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The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

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). The latest post mention was on 2023-12-11.