Best Free Open-Source Customizable Software

Open‑source headless commerce platform for developers and businesses

An open platform for various uses

Free and open-source HTML Dashboard UI Kit built on Bootstrap

Note-taking and database app

Open-source, flexible, and extensible low-code platform

Cross-platform, customizable ML solutions for live and streaming media

A terminal for a more modern age

Open-source Headless CMS

A modern, open-source, headless CMS

A note-taking application that knows programmers and Markdown better

A flexible, plugin-driven WYSIWYG markdown editor for the web

Fast, secure, efficient backup program

Tiling window manager for macOS

GPU-accelerated cross-platform terminal emulator

Fast, flexible flat‑file CMS for developers and designers

Open‑source task manager that blends time tracking, kanban and agile planning for freelancers and small teams.

Fast, header-only C++ logging library for high-performance applications

A high‑performance, open‑source e‑commerce platform built with Python and GraphQL

Android SMS and notification forwarder

All-in-one workspace for notes and knowledge management

Your Own URL Shortener

Open-source RSS feed generator