... I send out a list of most interesting libraries and apps in the "C++" section to about 1100 subscribers.
Do you want it too?
An experimental project to port Android Binder IPC subsystem to Ubuntu Linux.
Patched source files and install scripts for DarwinStreamingServer v6.0.3 with fixes for both generic Linux installs as well as Ubuntu
Xibo for Ubuntu - Digital Signage Player for Xibo Digital Signage
Library for connecting to the thinger.io cloud platform with Linux devices. Valid for Intel Edison, Raspberry, Ubuntu, Mac, etc.
PTAM (Parallel Tracking and Mapping for Small AR Workspaces) install in Ubuntu 10.10 and OpenCV2.3.1
Xournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows 10. Supports pen input from devices such as Wacom Tablets.
An open-source C++ library developed and used at Facebook.
Logitech K810/K811 Keyboard FN-keys switcher for Linux (Ubuntu)