Apps Related to Multiple Account support

KMyMoney is a straightforward and user-friendly open-source personal finance manager designed for managing your finances effectively, even if you're not a tech expert. It helps you track income, expenses, investments, and taxes with features like online banking import and robust reporting.

HomeBank is a robust, free, and open-source personal finance management software designed to help users track their income, expenses, and budget effectively across multiple platforms. It offers a comprehensive set of tools for managing various accounts, categorizing transactions, analyzing spending patterns, and planning future finances without requiring extensive technical knowledge.

YunoHost is a Debian-based open-source operating system designed for automating the installation and management of self-hosted web servers and applications. It simplifies the process of running your own internet services at home or on a small server.

Liferea is a free and open-source desktop news aggregator for Linux that allows users to subscribe to RSS, Atom, and other feed formats. It provides a simple interface for reading and managing news feeds, supporting offline reading and integration with various online services.

K-9 Mail is a free and open-source email client for Android, renowned for its focus on privacy, security, and extensive customization options. It supports multiple account types including IMAP, POP3, and Exchange.

Tutanota is a leading open-source email service offering robust end-to-end encryption and enhanced privacy. It provides a secure platform for communication and calendar management, accessible via web and dedicated applications.

Pidgin is a free and open-source multi-protocol instant messaging client designed to connect users across various chat networks with a single application. It's highly extensible through plugins and supports a wide range of protocols including XMPP, ICQ, and IRC.

Thunderbird is a free, open-source email client developed by the Mozilla Foundation, offering robust features for managing multiple email accounts, integrated chat, and RSS feeds. Known for its extensibility and focus on user privacy and security.