Apps Related to Multiple Account support

Funkwhale is a free and open-source, self-hostable platform for sharing music. It's a decentralized, community-oriented alternative to commercial music streaming services, built on ActivityPub for federation and offering features like music streaming, library management, playlists, and podcast support.

andOTP is a free and open-source Two-Factor Authentication (2FA) application for Android devices. It enables users to generate time-based (TOTP) and HMAC-based (HOTP) one-time passwords securely, enhancing the security of their online accounts.

CapRover is an open-source platform for deploying web applications, databases, and managing web servers quickly and efficiently. It simplifies the devops process, allowing developers to focus on coding rather than server administration.

FreeOTP is a free and open-source two-factor authentication application for generating one-time passwords, supporting both HOTP and TOTP standards. It enhances online security by providing an extra layer of protection beyond just passwords.

Playnite is a free and open-source video game library manager with a unified interface for all your games, regardless of their platform. It supports importing games from various digital stores and emulators, offering powerful organization, customization, and automation capabilities.

Gmvault is a free, open-source command-line tool designed to backup and restore your Gmail account. It provides a simple and efficient way to create local copies of your entire email history, offering peace of mind and accessibility to your data.

Tkabber is a free and open-source instant messaging client specifically designed for the XMPP protocol. Built with the Tk toolkit, it offers a lightweight yet extensible platform for text-based chat, group conversations, and various interactive functionalities supported by XMPP.

Ledger is a robust command-line accounting system based on the double-entry method. Ideal for users who prefer powerful text-based tools for managing finances, tracking investments, budgeting, and generating detailed financial reports.

TwentyFive is a versatile time tracking application designed to boost productivity for freelancers, teams, and individuals. It offers a range of features, including Pomodoro timers, project and task tracking, expense management, and reporting, all accessible through a user-friendly interface. Its focus on automated and real-time tracking helps users gain insights into their time allocation.

RedReader is a highly-regarded open-source Reddit client for Android, prioritizing a fast, efficient, and ad-free browsing experience. It offers extensive customization options, offline capabilities, and a focus on user privacy.

Skrooge is a robust, open-source personal finance management application designed to empower users to take control of their money. It offers a comprehensive suite of tools for tracking income and expenses, managing multiple accounts, budgeting, tax preparation, and investment monitoring.

Phoenix OS is a free operating system designed for personal computers, built upon the Android platform. It aims to provide a desktop-like experience, allowing users to run Android applications on traditional PC hardware with keyboard and mouse support.

Harmony Music Player is a versatile desktop client that unifies your music streaming services and local audio files into a single, sleek interface. Designed for music lovers who subscribe to multiple platforms like Spotify, Google Play Music, and SoundCloud, Harmony provides a streamlined listening experience with powerful features.

Grisbi is a robust, open-source personal financial management application designed to help users track their income and expenses, manage budgets, and gain insights into their financial health through comprehensive reporting.

FrontAccounting (FA) is a comprehensive, web-based ERP and accounting system designed for small to medium-sized businesses. It offers a wide range of modules covering financial accounting, inventory management, sales, purchases, and manufacturing.

Gmail Notifier (restartless) is a seamless browser extension for Chrome and Firefox, providing real-time notifications for new emails across all your connected Google Mail accounts and labels. Stay updated without constantly checking your inbox, streamlining your email management.

Kiwi IRC is a modern, open-source web-based Internet Relay Chat (IRC) client designed for simplicity and ease of use. It allows users to connect to various IRC networks directly through their web browser without needing to install desktop software.

Kontact is a comprehensive personal information management suite from KDE combining email, contacts, calendar, tasks, and news in one integrated application. It offers robust synchronization options and supports various protocols.

ZNC is a highly configurable IRC bouncer designed to maintain a persistent connection to IRC networks, allowing users to detach and reattach with their IRC client without losing context. It ensures you stay connected and informed even when your client is offline.

KMail is a powerful and flexible email client tightly integrated with the Kontact personal information manager suite. Part of the KDE ecosystem, it offers robust features for managing your email, including strong encryption options, support for multiple protocols like IMAP, POP3, and Exchange, and seamless integration with other Kontact components like the calendar and address book.

Rambox is a FOSS and portable messaging and emailing application that consolidates numerous web services into a single, convenient interface. It supports a wide array of communication and collaboration platforms, including popular chat, email, and social media services, offering a unified experience with features like unified inbox and notifications.

Twidere is a powerful and open-source Twitter client for Android, emphasizing customization, privacy, and support for multiple social networks beyond just Twitter, offering a refreshing Material Design interface.

Sandstorm.io is a self-hostable platform designed to empower users to run web applications securely on their own servers while ensuring strong privacy and sandboxing for each application instance.

Choqok is a free, open-source microblogging client designed for the K Desktop Environment. It provides a unified interface to manage multiple social media accounts, primarily focused on Twitter and Identica.

Money Manager Ex (MMEX) is a free, open-source, cross-platform personal finance software designed for easy money management. It offers tools for budgeting, expense tracking, and financial reporting across various accounts, suitable for beginners and those seeking a straightforward approach.

Mutt is a highly configurable, text-based email client for Unix-like systems. It offers powerful features for advanced users who prefer a lightweight and efficient email management experience directly from the command line.

Geary is a modern email client designed for the GNOME desktop, emphasizing a conversational view for streamlined email management. It offers a clean interface, supports multiple accounts, and integrates with the GNOME environment to provide a cohesive user experience for organizing and sending emails.

FreshRSS is a free, open-source, and self-hostable RSS aggregator designed to put you back in control of your news consumption. It offers a clean web interface, powerful filtering options, and robust import/export capabilities, making it an excellent alternative to commercial feed readers.

Claws Mail is a powerful yet lightweight, open-source email and news client built on GTK+. It's known for its speed, stability, rich feature set, and high degree of customization, making it an excellent choice for users demanding control and efficiency.

Cozy is a personal cloud platform designed to give users control over their digital lives. Store, sync, and share your photos, files, contacts, and calendar in a private and secure environment. It offers a suite of integrated applications to manage your data.