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Top 23 C++ Real-time Projects
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openpose
OpenPose: Real-time multi-person keypoint detection library for body, face, hands, and foot estimation
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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.
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filament
Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS, and WebGL2 (by google)
Filament - A modern, efficient graphics engine suitable for real-time rendering, link: http://google.github.io/filament.
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Project mention: An Analysis of the Performance of WebSockets in Various Programming Languages | news.ycombinator.com | 2024-11-22
NodeJS beating C++ in these benchmarks makes me suspect the methodology / server setup since the NodeJS library[0] used is just a wrapper around the C++ library[1].
[0]: https://github.com/uNetworking/uWebSockets.js
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perspective
A data visualization and analytics component, especially well-suited for large and/or streaming datasets.
Yes! This is the pro version, we also develop open source https://github.com/finos/perspective (which Prospective is substantially built on, with some customizations such as a wasm64 runtime).
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Project mention: Launch HN: ParaQuery (YC X25) – GPU Accelerated Spark/SQL | news.ycombinator.com | 2025-05-12
Cool project, congratulations.
How would you contrast it against HeavyDB?
https://github.com/heavyai/heavydb
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Project mention: Show HN: AOO – real-time audio streaming and messaging | news.ycombinator.com | 2024-10-12
* How does this compare to Roc, if you've looked at it? https://github.com/roc-streaming/roc-toolkit
* Would it be possible to have pulse/pipewire sink/source examples to quickly get started on desktop?
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MocapNET
We present MocapNET, a real-time method that estimates the 3D human pose directly in the popular Bio Vision Hierarchy (BVH) format, given estimations of the 2D body joints originating from monocular color images. Our contributions include: (a) A novel and compact 2D pose NSRM representation. (b) A human body orientation classifier and an ensemble of orientation-tuned neural networks that regress the 3D human pose by also allowing for the decomposition of the body to an upper and lower kinematic
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LiveScan3D
LiveScan3D is a system designed for real time 3D reconstruction using multiple Azure Kinect or Kinect v2 depth sensors simultaneously at real time speed.
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> What happened to Mega Glest?
It's linked from the main page: https://megaglest.org/
Looks like it still has some activity?
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Project mention: Designing a Home Radio Telescope for 21 Cm Emission | news.ycombinator.com | 2024-11-04
Have a look at this (and other repos/website) https://github.com/30hours/blah2
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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).
C++ Real-time discussion
C++ Real-time related posts
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Ask HN: Is AG Grid worth it?
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Show HN: Python Stream Processing with Denormalized
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Designing a Home Radio Telescope for 21 Cm Emission
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Show HN: Squey, an open-source tabular data visualization software
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Perspective Virtual API: batched data from the server to the client
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Perspective: A Data Visualization Library
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Perspective: High-performance data visualization and analytics in WebAssembly
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A note from our sponsor - SaaSHub
www.saashub.com | 14 Jun 2025
Index
What are some of the best open-source Real-time projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | openpose | 32,615 |
| 2 | filament | 18,536 |
| 3 | µWebSockets | 17,999 |
| 4 | fprime | 10,325 |
| 5 | perspective | 9,206 |
| 6 | tiny-cuda-nn | 4,065 |
| 7 | heavydb | 3,007 |
| 8 | nCine | 1,172 |
| 9 | roc-toolkit | 1,157 |
| 10 | SideFXLabs | 1,098 |
| 11 | sofa | 1,018 |
| 12 | MocapNET | 893 |
| 13 | hdl_localization | 881 |
| 14 | 3DObjectTracking | 876 |
| 15 | ImStudio | 807 |
| 16 | LiveScan3D | 778 |
| 17 | ov2slam | 626 |
| 18 | Yave | 480 |
| 19 | distortos | 453 |
| 20 | nap | 419 |
| 21 | megaglest-source | 373 |
| 22 | blah2 | 337 |
| 23 | tscns | 328 |
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www.influxdata.com