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Best open source C++ projects[027]

27 curated open source projects written primarily in C++, ranked by GitHub stars. Combined: 526,747 stars.

// DEVELOPER TOOLS№ 001
Godot

Godot

★ FEATUREDC++

Create 2D & 3D games with complete creative freedom

★ STARS

110.4k

⑂ FORKS

25.2k

OPEN PROJECT
// DEVELOPER TOOLS№ 002
Ladybird

Ladybird

★ FEATUREDC++

Truly independent web browser backed by non-profit

★ STARS

63.2k

⑂ FORKS

3.0k

OPEN PROJECT
// DATABASE№ 003
ClickHouse

ClickHouse

C++

ClickHouse is the fastest and most resource efficient open-source database for real-time apps and analytics

★ STARS

47.3k

⑂ FORKS

8.4k

OPEN PROJECT
// DATABASE№ 004
DuckDB

DuckDB

C++

DuckDB is an analytical in-process SQL database management system

★ STARS

38.0k

⑂ FORKS

1.9k

OPEN PROJECT
// DATABASE№ 005
Dragonfly

Dragonfly

★ FEATUREDC++

Dragonfly is a high-performance, Redis-compatible in-memory data store that delivers up to 25x more throughput and 80% lower costs than legacy solutions.

★ STARS

30.5k

⑂ FORKS

1.2k

OPEN PROJECT
// AUTH & SECURITY№ 006
KeePassXC

KeePassXC

C++

KeePassXC is an open-source password manager that securely stores and manages sensitive information across Windows, macOS, and Linux.

★ STARS

27.0k

⑂ FORKS

1.8k

OPEN PROJECT
// OTHER№ 007
RethinkDB

RethinkDB

C++

The open source database for the realtime web.

★ STARS

27.0k

⑂ FORKS

1.9k

OPEN PROJECT
// DEVELOPER TOOLS№ 008
Typesense

Typesense

C++

Open Source alternative to Algolia + Pinecone

★ STARS

25.8k

⑂ FORKS

886

OPEN PROJECT
// UI COMPONENTS№ 009
Audacity

Audacity

C++

Free, open-source audio editor and recorder for all platforms. Record, edit, mix and enhance audio with professional tools. Perfect for music, podcasts, and more.

★ STARS

16.9k

⑂ FORKS

2.5k

OPEN PROJECT
// DEVOPS№ 010
Ceph

Ceph

C++

Ceph provides unified object, block, and file storage from a single cluster built on commodity hardware.

★ STARS

16.6k

⑂ FORKS

6.4k

OPEN PROJECT
// DEVELOPER TOOLS№ 011
Helium

Helium

C++

Open-source Chromium-based browser offering best-in-class privacy protection, unbiased ad-blocking, split view, native !bangs, and zero bloat by default.

★ STARS

15.5k

⑂ FORKS

370

OPEN PROJECT
// ANALYTICS№ 012
organic-maps

organic-maps

C++

Free, open-source offline maps app with detailed trails, turn-by-turn navigation, and zero tracking. Perfect for hikers, cyclists, and travelers seeking privacy.

★ STARS

13.9k

⑂ FORKS

1.4k

OPEN PROJECT
// DEVELOPER TOOLS№ 013
Shotcut

Shotcut

C++

Free, open-source video editor supporting 4K resolution, hundreds of formats, and professional features like Blackmagic Design integration across Windows, Mac, and Linux.

★ STARS

13.9k

⑂ FORKS

1.4k

OPEN PROJECT
// DATABASE№ 014
KeyDB

KeyDB

C++

The only database you'll ever need

★ STARS

12.5k

⑂ FORKS

659

OPEN PROJECT
// DATABASE№ 015
Manticore Search

Manticore Search

C++

Open source search database delivering 2.83x faster performance than Elasticsearch. Features vector search, SQL interface, and full-text capabilities.

★ STARS

11.8k

⑂ FORKS

624

OPEN PROJECT
// DATABASE№ 016
OceanBase

OceanBase

C++

Scalable, high-availability database system supporting OLTP, OLAP, and hybrid transactional/analytical processing workloads.

★ STARS

10.1k

⑂ FORKS

1.9k

OPEN PROJECT
// OTHER№ 017
Krita

Krita

C++

Free and open source painting program built by artists for artists. Features professional brushes, layers, animation tools, and drawing assistants for all skill levels.

★ STARS

9.7k

⑂ FORKS

775

OPEN PROJECT
// AI & ML№ 018
Activeloop

Activeloop

C++

Database for AI

★ STARS

9.1k

⑂ FORKS

709

OPEN PROJECT
// DEVELOPER TOOLS№ 019
Kdenlive

Kdenlive

C++

Cross-platform non-linear video editor offering professional features for free. Edit videos on Linux, Windows, macOS, and BSD with advanced tools and effects.

★ STARS

5.0k

⑂ FORKS

413

OPEN PROJECT
// AI & ML№ 020
Memgraph

Memgraph

C++

Memgraph is a scalable, in-memory graph database solution offering high-performance computing and Neo4j compatibility.

★ STARS

4.0k

⑂ FORKS

222

OPEN PROJECT
// AUTH & SECURITY№ 021
RawTherapee

RawTherapee

C++

Free, cross-platform raw image processor with 32-bit floating point engine, advanced demosaicing algorithms, and professional-grade editing tools for photographers.

★ STARS

3.9k

⑂ FORKS

394

OPEN PROJECT
// OTHER№ 022
LibreOffice

LibreOffice

C++

Complete free office suite compatible with Microsoft formats (.doc, .docx, .xls, .xlsx, .ppt, .pptx). Open source alternative with regular updates.

★ STARS

3.9k

⑂ FORKS

832

OPEN PROJECT
// DEVOPS№ 023
collabora-online

collabora-online

C++

Powerful online document editor with Microsoft Office compatibility. Integrate into your infrastructure or use trusted hosting partners for secure team collaboration.

★ STARS

3.2k

⑂ FORKS

1.0k

OPEN PROJECT
// ANALYTICS№ 024
Hydra

Hydra

C++

Serverless Analytics on Postgres

★ STARS

3.1k

⑂ FORKS

179

OPEN PROJECT
// DEVOPS№ 025
Icinga

Icinga

C++

Monitor networks, servers, and cloud environments with flexible open-source solution. Custom checks, fast alerts, and complete infrastructure control.

★ STARS

2.2k

⑂ FORKS

605

OPEN PROJECT
// DATABASE№ 026
Timeplus

Timeplus

C++

Timeplus is a lightweight, powerful, and cost-efficient stream processing platform for real-time analytics, deployed as a single binary.

★ STARS

2.2k

⑂ FORKS

107

OPEN PROJECT
// AI & ML№ 027
Standard Cyborg

Standard Cyborg

C++

Buid, test and deploy perception applications

★ STARS

67

⑂ FORKS

26

OPEN PROJECT

// FREQUENTLY ASKED

What are the best open source C++ projects?

The most popular by GitHub stars are Godot, Ladybird, ClickHouse, DuckDB, Dragonfly — see all 27 above.

What is the most popular C++ project?

Godot (110,447 stars). Create 2D & 3D games with complete creative freedom

How is this list updated?

Star counts and project metadata are refreshed nightly from the GitHub API.