Btw

Open source personal website builder for instant blogging

Bucketeer

Feature flag management and A/B testing platform

Budibase

Low-code platform for building internal tools and workflows

Bugsink

Self-hosted error tracking compatible with Sentry SDK

Builder.io

Visual development platform turning designs into production code

buku

Powerful command-line bookmark manager with private, portable database

BunkerWeb

Secure your web services by default with a flexible WAF

ByConity

Cloud-native data warehouse with compute-storage separation for large-scale analytics

ByteChef

Open-source low-code platform for API integration and workflow automation

Bytedesk

AI‑powered omnichannel chat platform for teams and support

Cachet

Self-hosted status page system for service monitoring

Caddy WAF

Advanced, customizable WAF middleware for Caddy web server

Cal.com

Open-source scheduling infrastructure you control and customize

Calico

Scalable, high-performance networking and security for cloud-native workloads

Canine

Kubernetes deployment platform with Heroku-like simplicity

Canvas LMS

Modern open-source learning management system by Instructure

Cap

Open source video messaging with instant screen recording

CapRover

Self-hosted PaaS for effortless app deployment without Docker expertise

Carbon

A modular, API‑first operating system for modern manufacturing.

Cartero

Native graphical HTTP client for testing APIs freely

Casdoor

UI-first IAM and SSO platform with comprehensive protocol support

CBoard

Drag-and-drop multidimensional BI platform for fast data insights

CDS

Enterprise-grade CI/CD platform with visual workflows and CLI

Ceph

Scalable distributed storage system for modern infrastructure