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Top 23 C Openbsd Projects
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Kargo
Stop Scripting Promotions. Start Shipping with Kargo. Kargo automates promotion across dev, staging, and prod with approval gates and verification. Open source, built by the team behind Argo CD. Download now.
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src
Read-only git conversion of OpenBSD's official CVS src repository. Pull requests not accepted - send diffs to the tech@ mailing list.
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stress-ng
This is the stress-ng upstream project git repository. stress-ng will stress test a computer system in various selectable ways. It was designed to exercise various physical subsystems of a computer as well as the various operating system kernel interfaces.
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LibreSSL
LibreSSL Portable itself. This includes the build scaffold and compatibility layer that builds portable LibreSSL from the OpenBSD source code. Pull requests or patches sent to tech@openbsd.org are welcome.
Choosing a cryptographic library nowadays is hard. 10 years ago, only few projects were available, and most of the time, we were using OpenSSL or one of its fork like LibreSSL. GnuTLS, BearSSL, PolarSSL or WolfSSL were also other alternatives to consider. Instead of reusing the already deeply tested and checked libraries, all "modern languages" decided to reimplement their own.
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AppSignal
Monitoring that respects your time & budget. APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.
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puNES
Qt-based Nintendo Entertaiment System emulator and NSF/NSF2/NSFe Music Player (Linux, FreeBSD, OpenBSD and Windows)
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InitWare
The InitWare Suite of Middleware allows you to manage services and system resources as logical entities called units. Its main component is a service management ("init") system.
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dhcp
ISC DHCP is enterprise grade, open source solution for DHCP servers, relay agents, and clients, supports both IPv4 and IPv6, and is suitable for use in high-volume and high-reliability applications. (by isc-projects)
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pl0c
Self-hosting PL/0 to C compiler to teach basic compiler construction from a practical, hands-on perspective.
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ts-warp
Cross-platform proxy client and server for SOCKS, HTTP, and SSH protocols with transparent mode, policy-based routing and multi-proxy rules.
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https://minc.commandlinerevolution.nl/english/home.html
Then get 7zip to decompress the s9fes TGZ file, cd to that directory, and run 'make'.
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There is a hammer2fs port for openbsd that is actively maintained
https://github.com/kusumi/openbsd_hammer2
Somehow it was just never taken over the finish line though. I don't know why.
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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 Openbsd discussion
C Openbsd related posts
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OpenBSD 7.8 を 7.9 へ アップグレード
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OpenBSD Upgrade 7.8 to 7.9
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Karpathy's Pelican
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OpenBSD has a use-after-free allowing local privilege escalation to root
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Working around dragons with the Lemote Yeeloong laptop and OpenBSD
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OpenVPN Daemon Double Free Bug
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Missing Libraries on OpenBSD
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A note from our sponsor - SaaSHub
www.saashub.com | 11 Sep 2026
Index
What are some of the best open-source Openbsd projects in C? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | cosmopolitan | 21,278 |
| 2 | zapret | 16,088 |
| 3 | src | 3,872 |
| 4 | stress-ng | 2,754 |
| 5 | LibreSSL | 1,491 |
| 6 | arp-scan | 1,292 |
| 7 | solo5 | 993 |
| 8 | rdrview | 939 |
| 9 | puNES | 818 |
| 10 | exploits | 676 |
| 11 | mg | 616 |
| 12 | oksh | 456 |
| 13 | signify | 319 |
| 14 | InitWare | 311 |
| 15 | dhcp | 206 |
| 16 | OpenVi | 198 |
| 17 | pl0c | 154 |
| 18 | ts-warp | 137 |
| 19 | loksh | 132 |
| 20 | minc-devel | 122 |
| 21 | openbsd_hammer2 | 93 |
| 22 | bbcp | 92 |
| 23 | BSDCoreUtils | 71 |
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