[Discussion] What are some old C++ open source projects you wish were still active?

This page summarizes the projects mentioned and recommended in the original post on /r/cpp

InfluxDB – Built for High-Performance Time Series Workloads
InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
www.influxdata.com
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SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives
www.saashub.com
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  1. RmlUi

    RmlUi - The HTML/CSS User Interface library evolved

    Thanks for the suggestion! I was just taking a look through the Issues and looks like RmlUi Forked and is currently maintained now https://github.com/mikke89/RmlUi. Doesn't look this this deviated from the core idea here of librocket and is actively maintained since 2019.

  2. InfluxDB

    InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

    InfluxDB logo
  3. libRocket

    libRocket - The HTML/CSS User Interface library

  4. VTK

    Mirror of Visualization Toolkit repository

    You are referring to the Visualization Toolkit right? Looking at that it appears to be actively maintained stilled I think. https://github.com/Kitware/VTK

  5. birdtray

    new mail system tray notification icon for Thunderbird

  6. ImGuiColorTextEdit

    Colorizing text editor for ImGui

    ImGuiColorTextEdit is a quite complete text editor for ImGui.

  7. RakNet

    Discontinued RakNet is a cross platform, open source, C++ networking engine for game programmers.

    RakNet. It's been forked but still not that active.

  8. SLikeNet

    SLikeNet™ is an Open Source/Free Software cross-platform network engine written in C++ and specifially designed for games (and applications which have comparable requirements on a network engine like games) building upon the discontinued RakNet network engine which had more than 13 years of active development.

    RakNet. It's been forked but still not that active.

  9. SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    SaaSHub logo
  10. agg-2.6

    AGG Anti-Grain Geometry Library

    There exist a couple of forks (one, two), but activity is low.

  11. cppcoro

    A library of C++ coroutine abstractions for the coroutines TS

    Maybe not old, but I wish cppcoro was still updated. It was such a nice start!

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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Did you know that C++ is
the 7th most popular programming language
based on number of references?