From the makers of ERPNext, Frappe Books simplifies invoicing, billing, and accounting for freelancers and small business owners. Create professional invoices, generate beautiful PDFs and send them to your customers.

Browse 870 Flatpak Packages on AlternativeTo.
From the makers of ERPNext, Frappe Books simplifies invoicing, billing, and accounting for freelancers and small business owners. Create professional invoices, generate beautiful PDFs and send them to your customers.

Scilab is free and open source software for numerical computation providing a powerful computing environment for engineering and scientific applications. Scilab includes hundreds of mathematical functions.




An unofficial client for the self-hosted Tandoor recipe management software. Built with Jetpack Compose and Material You to deliver a modern, intuitive and responsive user experience.




Open-source email client with unified inbox, IMAP/SMTP, OAuth2 support, conversation threading, TipTap rich text composer, contact sync, dark mode, and keyboard shortcuts.

The intelligent cross-platform C/C++ IDE. CLion is a new IDE that helps you be more productive while developing apps with C and C++ for Windows, Linux and OS X. Take advantage of proven JetBrains expertise in code quality, efficient code navigation, smart code completion...
Track your progress, identify triggers, and celebrate milestones on your path to a healthier life.



Burp Suite is an integrated platform for performing security testing of web applications. Its various tools work seamlessly together to support the entire testing process, from initial mapping and analysis of an application's attack surface, through to finding and exploiting...

Feeel is an open-source Android app for doing simple at-home exercises. It holds the acclaimed full body scientific 7-minute workout regime and allows creating custom workouts as well. While the app currently contains a limited amount of exercises, the plan is to drastically...




Securely connect your devices to open files and links where you need them, get notifications when you need them, stay in control of your media and more.


A document viewer for the GNOME desktop. You can view, search or annotate documents in many different formats.


pgAdmin is the most popular and feature rich open source administration and development platform for PostgreSQL, the most advanced open source database in the world.




Lagrange is a desktop GUI client for browsing Geminispace. It offers modern conveniences familiar from web browsers, such as smooth scrolling, inline image viewing, multiple tabs, visual themes, Unicode fonts, bookmarks, history, and page outlines.

Keypunch lets you practice typing. Thanks to fast-paced sessions with instant feedback afterwards and a plethora of available languages, you might even have a little fun doing so. With determination, proper technique and some time, you will observe a noticeable increase in both...




DataGrip is a database IDE from JetBrains that is tailored to suit specific needs of professional SQL developers.



Emulates PlayStation 4 titles on Windows and Linux systems using C++20, open-source codebase, features Vulkan graphics, SDL3, and ImGui integration.








An application that provides battery monitoring and feature control for supported Bluetooth wearable audio devices, including AirPods, Beats, Sony, Samsung Galaxy Buds and Nothing/CMF buds.







FeedDeck is an open source RSS and social media feed reader, inspired by TweetDeck. FeedDeck allows you to follow your favorite feeds in one place on all platforms.




Developed by Mijorus, an Italian developer participating in the GNOME project, Gear Lever is available as a flatpak on Flathub.




Fooyin is a music player built around customization. It offers a growing list of widgets to manage and play your local music collection. It's extendable through the use of plugins, and many widgets make use of FooScript to offer an even deeper level of control.




Helio is a cross-platform lightweight music speed-painting tool. It features linear-based sequencer with clean UI, integrated version control to sync the projects between devices, export to midi and more.




Fractal is a Matrix messaging app for GNOME written in Rust. Its interface is optimized for collaboration in large groups, such as free software projects.


