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

1Password
1Password is a commercial password manager developed by AgileBits. It stores login credentials, credit card details, software licenses, secure notes, and other sensitive information in encrypted vaults protected by a master password and a Secret Key. The service is available on macOS, Windows, Linux, iOS, Android, and as browser extensions, with data syncing across devices through 1Password's cloud. Features include a built-in password generator, secure sharing of vaults between users, and Watchtower, which flags weak, reused, or compromised passwords. 1Password offers plans for individuals, families, and businesses, with shared vaults, role-based access controls, and admin tools for team management. It uses a zero-knowledge architecture with end-to-end AES-256 encryption, meaning data is encrypted on the user's device and 1Password cannot access the contents of stored vaults. Pricing follows a subscription model with monthly or annual billing; no free tier is available, though a trial period is offered.

3Commas
3Commas is a cloud-based cryptocurrency trading platform that offers automated trading bots, portfolio management, and smart trading tools. It supports DCA bots, grid bots, and TradingView integration across multiple exchanges.

ADS-B Exchange
//www.adsbexchange.com:Crowd-sourced, unfiltered ADS-B flight-tracking network with a community-maintained live map. It discontinued its free API tier, so programmatic access is now a paid product.

AWS
Open source alternatives to AWS.
AWS EventBridge Scheduler
AWS EventBridge Scheduler is a serverless scheduler from Amazon Web Services, part of the EventBridge event bus service. It invokes any AWS API or HTTPS endpoint on a one-time or recurring schedule, with one-time and recurring invocations, rate expressions, cron and rate expressions, retry policies with dead-letter queues, and integration with IAM, KMS and CloudWatch. It is a proprietary, usage-priced managed service.

AWS Secrets Manager
AWS Secrets Manager is a managed AWS service for storing, retrieving, and rotating secrets such as database credentials, API keys, and OAuth tokens. Secrets are encrypted with AWS KMS, access is controlled with IAM policies, and automatic rotation is built in. It is billed per stored secret and per API call.

Acronis
Acronis Cyber Protect (formerly Acronis True Image) is a comprehensive backup and cybersecurity solution for individuals and businesses. It combines backup, anti-malware, anti-ransomware, and recovery tools in a single platform, allowing users to back up entire systems, disks, files, and applications to local storage or the cloud.

Adobe Acrobat
Adobe Acrobat is a family of application software and Web services developed by Adobe Inc. to view, create, manipulate, print and manage Portable Document Format (PDF) files. The paid Pro/DC versions include advanced editing, form creation, digital signatures, and collaboration features.

Adobe Acrobat Reader
Adobe Acrobat Reader is a free, cross-platform application that allows users to view, print, and interact with PDF documents. It supports features like text search, annotation, form filling, and digital signatures, making it a widely used tool for reading and managing PDF files.

Adobe After Effects
Adobe After Effects is Adobe industry-standard application for motion graphics, compositing and visual effects. Designers and studios use it to animate titles and logos, build kinetic typography, composite layers with masks and keyframes, track cameras, apply hundreds of plug-in effects and render finished shots for broadcast, film and the web. It is available through an Adobe Creative Cloud subscription on macOS and Windows, and it integrates with Adobe Premiere Pro and other Creative Cloud tools.
Adobe Analytics
Enterprise web analytics platform for measuring and analyzing customer journeys across digital channels.

Adobe Bridge
Adobe Bridge is a free desktop asset browser from Adobe that ships with Creative Cloud. It browses folders, previews RAW and design files, and edits metadata, keywords, ratings and labels used by Photoshop, Lightroom and other Adobe apps.

Adobe Express
Adobe Express is Adobe all-in-one, template-driven design app for creating social graphics, flyers, logos, one-page websites, and short videos quickly. It ships with thousands of templates, stock photos, fonts, and brand kits, and integrates Adobe Firefly AI for text-to-image generation and quick actions like background removal. It runs in a browser, on mobile, and on desktop, with a free tier and a Premium plan that is included with Adobe Creative Cloud subscriptions.
Adobe Illustrator
Adobe Illustrator is a vector graphics editor and design software developed by Adobe. It is the industry standard for creating logos, icons, illustrations, and typography.

Adobe InDesign
Adobe InDesign is Adobe professional desktop publishing and page layout application, part of Creative Cloud. Art directors, designers and publishers use it to compose multi-page documents — magazines, books, brochures, posters and PDFs — with threaded text frames, styles, parent pages, precise typography controls and CMYK colour management. It is subscription software available for macOS and Windows, with an iPad version and Adobe InCopy for collaborative text editing.

Adobe Lightroom
Adobe Lightroom is a photo editing and image organization software developed by Adobe. It is widely used by professional photographers for non-destructive raw photo editing.

Adobe Photoshop
Adobe Photoshop is the industry-standard image editing and graphic design software used by photographers, designers, and digital artists for photo manipulation, compositing, and digital painting. Part of the Adobe Creative Cloud suite.

Adobe Premiere Pro
A professional video editing application by Adobe, widely used for film, TV, and web video production.
Adobe XD
Adobe XD is a vector-based UX design tool for web apps and mobile apps, developed by Adobe. It supports prototyping, wireframing, and collaborative editing features.

Age of Empires
Age of Empires is a proprietary real-time strategy game franchise originally developed by Ensemble Studios and published by Microsoft. It focuses on building civilizations, gathering resources, researching technologies, and commanding armies across historical settings.

Ahrefs
Ahrefs is a leading SEO toolset for marketing professionals. It offers powerful backlink analysis, keyword research, content exploration, rank tracking, and site audit capabilities to help improve search visibility.

Airtable
Open source alternatives to Airtable.

Algolia
Algolia is a hosted search engine API that provides fast and relevant search-as-a-service for websites and mobile apps. It powers real-time search and discovery experiences with AI-powered ranking.

AllTrails
AllTrails is a commercial hiking and outdoor-recreation app with a crowdsourced database of trail maps and reviews. The free tier offers basic navigation and trail discovery; AllTrails+ (paid subscription) unlocks offline maps, lifelike 3D maps, wrong-turn alerts, and route modification.
Amazon CodeGuru
Amazon CodeGuru is an AI-powered code review service by AWS that uses machine learning to detect bugs, security vulnerabilities, and performance issues in code. It supports Java and Python and integrates with GitHub, Bitbucket, and AWS CodeCommit.
Amazon Photos
Amazon Photos is a cloud storage service for photos and videos offered to Amazon Prime members, providing unlimited full-resolution photo storage, facial recognition search, and family vault sharing features.
Amplitude
Product analytics platform for tracking user behavior and driving growth through data-driven insights.

Ancestry.com
Ancestry.com is a subscription-based online genealogy platform owned by Ancestry.com LLC, a subsidiary of The Blackstone Group. It provides access to billions of historical records, family tree building, DNA testing services, and collaborative research tools. It is one of the largest consumer genealogy services in the world.

AnnounceKit
AnnounceKit is a product-update platform for building changelogs and announcing new features via in-app widgets, activity feeds, email notifications, and NPS surveys.

AnyList
Create and share grocery shopping lists. Features recipe collection and organization, meal planning calendar, web import, Siri integration, and list sharing with family and friends.

Apidog
Apidog is an all-in-one API development platform for designing, debugging, testing, and documenting APIs. It offers visual API design, automated testing, and team collaboration features with both cloud and self-hosted deployment options.

Apify
Cloud platform for web scraping and browser automation that hosts and runs scrapers at scale. Offers a marketplace of pre-built scraping tools and actors.

AppCleaner
Free Mac utility to thoroughly uninstall applications and their associated files.

AppFollow
AppFollow is a commercial app review management and ASO platform that aggregates App Store and Google Play reviews, tracks keyword rankings and monitors competitors on subscription plans.

AppScreens
AppScreens is a web-based App Store and Google Play screenshot generator. It provides a visual drag-and-drop editor with device frames, produces screenshots in every size required by the stores, includes templates for 80-plus language localizations, and offers direct uploads to the stores. The core generator is free to use online, with paid options for more screenshots and devices.
AppSignal
Application performance monitoring and error tracking from AppSignal B.V., with first-class support for Ruby, Elixir, Node.js, Python, and front-end JavaScript. It combines exceptions, performance traces, and host metrics in one dashboard.
AppTamer
Mac utility that automatically pauses applications to reduce CPU usage, extend battery life, and improve system performance.

AppTweak
AppTweak is a commercial App Store Optimization platform from Belgium that provides keyword research, rank tracking, metadata A/B testing and market intelligence for the Apple App Store and Google Play, sold as per-app subscriptions.

Appfigures
Appfigures is a commercial app analytics and ASO platform offering keyword rank tracking, review analysis, sales and download analytics, and competitor intelligence for the App Store and Google Play.
Apple Dictionaries
Apple Dictionaries is the built-in Dictionary app on macOS and iOS that bundles licensed dictionaries from Oxford, New Oxford American, and other publishers. It supports lookups from Spotlight and system-wide dictionary popups, but its content format is proprietary and adding custom dictionaries is limited to importing a narrow set of formats on macOS.

Apple Keynote
Apple Keynote is presentation software for macOS, iOS, and iPadOS. It focuses on cinematic transitions, refined typography, and Apple ecosystem integration, with real-time collaboration via iCloud and seamless handoff between Mac, iPad, and iPhone.

Apple Mail
Apple Mail is the default email client built into macOS, iOS, and iPadOS. It supports all standard email protocols and integrates tightly with the Apple ecosystem including iCloud, Calendar, and Contacts.

Apple Maps
A web mapping service developed by Apple Inc. It provides directions and estimated times of arrival for automobile, pedestrian, and public transportation navigation. Apple Maps also features Flyover mode, a feature that enables a user to explore certain densely populated urban centers and other places of interest in a 3D landscape composed of models of buildings and structures.

Apple Music
Apple's music streaming service with a catalog of over 100 million songs, lossless and spatial audio, and integration with the Apple ecosystem.
Apple Photos
Apple Photos is the default photo management application for macOS, iOS, and iPadOS. It organizes photos by time, location, people, and content, offers iCloud sync across Apple devices, face recognition, editing tools, and integration with the Apple ecosystem. Available on Mac, iPhone, and iPad.

Apple Podcasts
Apple Podcasts is Apple’s built-in podcast app for iOS, macOS, and other Apple devices. It offers a vast directory of podcasts, personalized recommendations, and seamless syncing across devices.

Asana
Web and mobile work management platform designed to help teams organize, track, and manage their work.

Aseprite
A proprietary pixel art and animation tool widely used by game developers and artists for creating sprites and animations.

Asset Panda
Asset Panda is a cloud-based fixed asset tracking and management platform for businesses of all sizes. Companies use it to log assets with custom fields, scan barcodes, track asset lifecycles and check-in/check-out, and run audits across locations on a subscription model. It is offered as a hosted service with web and mobile clients.

Audible
Audible is Amazon's audiobook subscription service, owned by Amazon.com. It offers a catalogue of over 500,000 audiobooks across bestsellers, originals, and exclusive content, distributed via a closed mobile and desktop app. Listeners pay a monthly fee for credits that can be exchanged for books, with optional access to a rotating selection of included titles through Audible Plus.

Auth0
Auth0 is a flexible, drop-in solution to add authentication and authorization services to your applications. It provides identity management, SSO, MFA, and social login for any platform.