Open Source Alternatives To Popular Software
Browse free, open source replacements for popular proprietary tools.

Family Tree Maker
Family Tree Maker is a commercial genealogy desktop application originally developed by Banner Blue Software and later acquired by Ancestry.com. It is now published by Software MacKiev and is available for Windows and macOS. It allows users to build, organize, and share family trees, sync data with online Ancestry trees, and generate charts and reports.
Fantastical
Fantastical is a premium calendar app for macOS, iOS, and iPadOS from Flexibits. It offers natural-language event creation, multiple calendar views, and deep integration with Apple Calendar and reminders.

Fathom
AI notetaker that automatically records, transcribes, highlights, and summarizes your Zoom, Google Meet, and Teams meetings.

Fathom Analytics
Simple, privacy-focused website analytics without the use of cookies or invasive tracking.

Feedly
Open source alternatives to Feedly.

Figma
Figma is a collaborative web application for interface design and prototyping. It enables designers and teams to create, test, and ship designs through a browser-based editor with real-time collaboration features. Figma supports vector graphics editing, component libraries, design systems, and interactive prototypes — all with built-in versioning and shared libraries for team consistency. Popular among product teams for its ability to bridge design and development workflows.

Filmora
Filmora is a consumer video editing application developed by Wondershare, available for Windows, macOS, and mobile devices. It targets casual and semi-professional creators with a template-driven editing experience, drag-and-drop effects, AI-assisted tools such as automatic captions and background removal, and one-click social media export presets. Filmora is distributed as freemium software: a free version exports with a watermark, while removing it and unlocking the full effect library requires a subscription or perpetual license.

Final Cut Pro
Apple professional non-linear video editing application for macOS, known for its magnetic timeline and performance.

Finviz
Finviz is a stock screener and financial visualization platform offering real-time quotes, charts, and portfolio tracking. It provides heat maps, insider trading data, and technical signals for active investors.

Firebase
Open source alternatives to Firebase.

Firebase Remote Config
Google's cloud service for changing app behavior and appearance without publishing an app update, with audience targeting and A/B testing through Firebase.

Firecrawl
AI-powered web scraping and crawling API that turns any website into clean, LLM-ready Markdown or structured data. Handles JavaScript rendering, proxy rotation, and anti-bot measures automatically.

Fireflies.ai
AI meeting assistant that records, transcribes, summarizes, and analyzes voice conversations across platforms like Zoom, Google Meet, and Teams.

Firefox
Mozilla Firefox is a free, open source web browser developed by Mozilla. Known for its privacy features and extensibility, it is one of the few major browsers not based on Chromium.
FitNotes
FitNotes is a fitness app for logging workouts, tracking personal records, and building routines, designed for serious strength-training enthusiasts.
Fitbod
Fitbod is a subscription-based workout planner by Fitbod Inc. that builds personalized strength-training routines using an algorithm that factors in your workout history, muscle recovery, and available equipment. It logs sets, reps, and weights, gradually adapts exercises to balance training volume across muscle groups, and ships native apps for iOS, Android, and Apple Watch.

Flexera One
Flexera One is an enterprise IT asset management platform from Flexera. Its ITAM modules discover installed software, reconcile entitlements against usage, and optimise license spend across on-premises and cloud estates. It is a commercial product sold to large organisations and is one of the most widely deployed software asset management suites.
Flickr
Flickr is a popular image and video hosting service by SmugMug that allows users to upload, share, and organize photos. It offers free and paid tiers with community features, groups, and extensive photo management tools.

Flightradar24
//www.flightradar24.com:Commercial flight-tracking service that draws live aircraft positions from crowd-sourced ADS-B data. The free tier keeps a 7-day replay window, and deeper history, alerts, and higher request limits sit behind paid plans.

Fly.io
Fly.io is a cloud platform that runs application containers on servers close to users around the world. Apps are deployed with the flyctl CLI or the Machines API and run as VMs across Fly.io regions, with managed Postgres, Redis, private networking, and automatic HTTPS included.
Forestry
A Git-based CMS for static sites (discontinued). Provided a user-friendly interface for content editors working with Hugo, Jekyll, and other static site generators.

Foxit Reader
Foxit Reader is a multilingual PDF reader and editor from Foxit Software, available for Windows, macOS, and mobile platforms. It offers viewing, annotating, signing, form filling, and OCR features, with paid tiers (Foxit PDF Editor) unlocking advanced editing and redaction.

Frame.io
Frame.io is a cloud-based video review and collaboration platform for creative teams. It allows filmmakers, editors, marketers, and agencies to upload media, leave frame-accurate comments, share secure review links, and manage approval workflows. Acquired by Adobe in 2021, it is now integrated across Creative Cloud apps like Premiere Pro and After Effects.

Framer
Framer is a proprietary website builder and design tool from Framer B.V. that combines a design canvas with a hosted publishing platform, aimed at designers shipping marketing sites and landing pages without writing code.

FreshBooks
FreshBooks is a cloud-based accounting and invoicing software for small businesses and freelancers, offering invoicing, expense tracking, time tracking, and financial reporting.

Freshdesk
Freshdesk is Freshworks commercial cloud help desk. It combines email, chat, phone and social ticketing with automations, SLA policies, a knowledge base, customer portals and the Freddy AI assistants. It is sold per agent per month with a limited free tier, and there is no self-hosted edition.
FullStory
FullStory is a digital experience analytics platform that helps product teams understand user behaviour through session replay, heatmaps, and event-based analytics.

GPT4All
GPT4All is a proprietary desktop application for running local large language models on consumer hardware, developed by Nomic AI. It provides a chat interface, local document interaction (RAG), code generation, and model management for a curated set of open-weight models, with a focus on private, offline use without sending data to the cloud.

Gaana
Gaana is an Indian music streaming service from Entertainment Network India (Times Group), offering Bollywood soundtracks, Indipop, and songs in Indian regional languages, along with editorial playlists, charts, and podcasts. Access is free with ads, and a paid Plus tier removes ads and unlocks higher-quality streaming and downloads.

GameVault
GameVault is a self-hosted game distribution platform developed by Phalcode. It serves a library of DRM-free games to friends or a community through a store-like interface with user accounts, download handling, and gaming progress tracking. The server and client are free to self-host for personal use, with paid tiers offering premium features and support.

Geckoboard
Geckoboard is a paid dashboard platform that connects business apps and databases to TV dashboards and metric wallboards. It focuses on real-time visibility of KPIs for support, sales, marketing, and operations teams.

Ghost
A modern, open-source publishing platform for professional bloggers and publications, with hosted SaaS offering.
Giphy
GIF and short-form video search engine owned by Meta. Powers animated stickers and GIF search across Facebook, Instagram, WhatsApp, and Slack.

GitHub
GitHub is a web-based platform for version control and collaboration using Git. It provides source code management, pull requests, code review, CI/CD via GitHub Actions, issue tracking, and package registry. Owned by Microsoft.

GitHub Actions
GitHub built-in continuous integration and deployment platform that automates build, test, and deployment workflows directly from GitHub repositories.
GitHub Copilot
GitHub Copilot is an AI coding assistant and code review tool by GitHub that integrates with IDEs to provide intelligent code completion, chat, and automated pull request reviews. It is built on OpenAI models and helps developers write code faster while catching bugs and security issues.

GitLab
GitLab is a web-based DevOps lifecycle tool that provides a Git repository manager with wiki, issue-tracking, and CI/CD pipeline features. Available as both SaaS and self-managed. Owned by GitLab Inc.
GitLab CI/CD
GitLab integrated continuous integration and deployment platform built directly into the GitLab DevOps lifecycle.
GitLab Duo
GitLab Duo is GitLab suite of AI-powered features for code review, code generation, and DevOps automation. It includes AI-assisted code review suggestions, security vulnerability detection, and automated code explanations.

Glean
AI-powered enterprise search and knowledge discovery platform that connects to all company apps to deliver personalized answers.
Gmail
Gmail is a free email service developed by Google. It is the most widely used consumer and business email platform, and is part of Google Workspace for organizations.

Gong
Revenue intelligence platform that captures customer interactions, provides AI-driven insights, and helps sales teams close more deals.

Goodreads
Goodreads is Amazon's social cataloging platform for books, allowing users to track books they have read, are reading, or want to read. It offers reviews, recommendations, reading challenges, and community features for book enthusiasts.

Google Analytics
Google Analytics is a web analytics service by Google that tracks and reports website traffic. It helps businesses and individuals understand user behavior, measure performance, and optimize content by providing insights into visitor demographics, sources, and engagement patterns.

Google Authenticator
Google Authenticator is a free mobile app developed by Google that provides two-factor authentication (2FA) to enhance account security. It generates time-based, one-time passcodes (TOTP) or counter-based codes (HOTP) that users enter along with their password when signing into supported services. By scanning a QR code or entering a setup key, users can link the app to their accounts, ensuring that even if a password is stolen, unauthorized access is far less likely without the corresponding code from the app. It works offline, making it both secure and convenient for protecting online accounts.

Google Calendar
Google Calendar is Google free time-management and scheduling service, part of the Google Workspace suite. It lets users create and share events, set reminders, and sync across devices through their Google account.

Google Chrome
Google Chrome is the world's most widely used web browser, developed by Google and built on the open source Chromium project. It dominates the market with over 60% share and sets the pace for web standards adoption.

Google Cloud
Open source alternatives to Google Cloud.
Google Cloud Scheduler
Google Cloud Scheduler is a fully managed, serverless cron job scheduler from Google Cloud. It lets you trigger HTTP targets, Pub/Sub topics, and App Engine endpoints on a cron schedule, with at-least-once delivery, retry policies, and integration with Google IAM and Cloud Logging. It is a proprietary service billed per job per month.

Google Contacts
Googles cloud-based contact management service integrated with Gmail, Calendar, and other Google Workspace apps.

Google Docs
Google Docs is a web-based word processor by Google, allowing users to create, edit, and collaborate on documents in real time.