Best Free Developer Tools Tools (19 Picks)

Developer tools for Git repository management, API testing, secret management, and data labeling. Self-hosted alternatives to GitHub and Postman for managing source code and credentials on your own infrastructure.

19 tools

dify

dify

136,641TypeScriptNOASSERTION

Production-ready platform for agentic workflow development.

Open Core
uptime-kuma

uptime-kuma

84,964JavaScriptMIT

A fancy self-hosted monitoring tool

Free
hoppscotch

hoppscotch

78,846TypeScriptMIT

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

Freemium
Stirling-PDF

Stirling-PDF

76,389TypeScriptNOASSERTION

#1 PDF Application on GitHub that lets you edit PDFs on any device anywhere

Free
vaultwarden

vaultwarden

58,081RustAGPL-3.0

Unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs

Free
meilisearch

meilisearch

57,008RustNOASSERTION

A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.

Open Core
gitea

gitea

54,779GoMIT

Git with a cup of tea! Painless self-hosted all-in-one software development service, including Git hosting, code review, team collaboration, package registry and CI/CD

Open Core
bruno

bruno

42,718JavaScriptMIT

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

Free
refine

refine

34,427TypeScriptMIT

A React Framework for building internal tools, admin panels, dashboards & B2B apps with unmatched flexibility.

Free
keycloak

keycloak

33,770JavaApache-2.0

Open Source Identity and Access Management For Modern Applications and Services

Free
harbor

harbor

27,934GoApache-2.0

An open source trusted cloud native registry project that stores, signs, and scans content.

Free
infisical

infisical

25,760TypeScriptNOASSERTION

Infisical is the open-source platform for secrets, certificates, and privileged access management.

Open Core
typesense

typesense

25,549C++GPL-3.0

Open Source alternative to Algolia + Pinecone and an Easier-to-Use alternative to ElasticSearch ⚡ 🔍 ✨ Fast, typo tolerant, in-memory fuzzy Search Engine for building delightful search experiences

Open Core
gitlabhq

gitlabhq

24,299RubyNOASSERTION

GitLab CE Mirror | Please open new issues in our issue tracker on GitLab.com

Open Core
authentik

authentik

20,869PythonNOASSERTION

The authentication glue you need.

Open Core
crowdsec

crowdsec

12,988GoMIT

CrowdSec - the open-source and participative security solution offering crowdsourced protection against malicious IPs and access to the most advanced real-world CTI.

Open Core
coder

coder

12,825GoAGPL-3.0

Secure environments for developers and their agents

Open Core
documenso

documenso

12,593TypeScriptAGPL-3.0

The Open Source DocuSign Alternative.

Open Core
clients

clients

12,568TypeScriptNOASSERTION

Bitwarden client apps (web, browser extension, desktop, and cli).

Open Core