Mac OS X Softwares to Multiple Account support

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.

Nylas Mail, an extensible open-source email client, offers a unified inbox, robust search, and calendar integration. It supports multiple accounts and provides features like email tracking and undo send, aiming to enhance productivity and email management for users.

Airmail is a powerful and lightning-fast email client designed for macOS and iOS. It aims to provide a clean, modern interface with advanced features for managing multiple email accounts efficiently.

Fretsi is a social knowledge platform designed to transform how we consume and share information. It serves as an intelligent RSS feed reader and news aggregator, allowing users to curate, filter, and discover content from diverse sources. Beyond aggregation, Fretsi fosters a community where knowledge is valued, making it a rewarding experience for both readers and contributors.

Inky is a feature-rich email client prioritizing security and a clean interface across Windows, macOS, iOS, and Android. It offers seamless multi-account management, robust privacy features including encryption, and integrations for enhanced productivity and organization.

Franz is a free, open-source application that consolidates multiple messaging and chat services into a single, convenient interface. It allows users to manage conversations across platforms like WhatsApp, Telegram, Slack, and more without switching between different apps.

Wire is a secure, cross-platform messaging and collaboration client offering end-to-end encryption by default for all communication types including messaging, voice and video calls, and file sharing across desktop and mobile devices.

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.

Newton is a powerful, subscription-based email client designed for efficiency and productivity across multiple platforms. It offers a clean interface, unified inbox, and advanced features like read receipts, undo send, and integrations with popular productivity tools.

Koofr is a secure, EU-based cloud storage service offering a generous free tier and the unique ability to connect multiple existing cloud accounts from providers like Google Drive, Dropbox, and OneDrive. It serves as a centralized hub for all your digital files, enhancing accessibility and management across platforms.

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.

Opera Mail, formerly known as M2, is a versatile and lightweight email and news client developed by Opera Software. It offers a unified approach to managing email, news feeds, and contacts with a strong emphasis on organization and speed.

Tweetbot is a popular Twitter client for Apple devices, offering advanced features and a clean interface for managing your Twitter experience beyond the basic Twitter app.

Twitterrific is a long-standing third-party Twitter client available for macOS and iOS. It distinguishes itself with a clean interface, customizable features, and a focus on the user experience, offering features like push notifications, timeline synchronization, and ad blocking for a more focused Twitter interaction.

Postbox is a powerful and customizable email client designed for professionals managing high volumes of email. It offers robust features for organizing, searching, and managing multiple accounts efficiently, enhancing productivity through a clean interface and advanced tools.

Zimbra Desktop provides a unified interface for managing multiple email accounts, calendars, tasks, and contacts offline. It supports various protocols like IMAP, POP, CalDAV, and CardDAV, offering a comprehensive personal information management solution.

Postcron is a comprehensive social media scheduling and publishing tool designed to streamline the process of managing multiple social media accounts. It allows users to schedule posts in advance, automate content distribution, and analyze performance across various platforms like Facebook, Twitter, Instagram, LinkedIn, and Pinterest.

Apple Mail is the default email client for macOS, iOS, and watchOS, offering a seamless and integrated email experience across Apple devices with features like rich text editing, multiple account support, and robust organization tools.

Reeder is a sleek and powerful RSS reader designed for macOS and iOS users. It provides a streamlined way to subscribe to your favorite news sources, blogs, and podcasts, offering offline reading, multiple account support, and integration with popular RSS services like Feedly.

Microsoft Outlook is a comprehensive personal information manager designed for managing email, contacts, calendars, and tasks.

Stacker is a comprehensive social media management platform designed for businesses and individuals to streamline their social media presence. It simplifies the process of publishing, scheduling, and analyzing content across multiple social networks, enhancing efficiency and maximizing reach.

TweetDeck is a powerful, real-time dashboard for managing multiple Twitter accounts, offering customizable columns to monitor feeds, interactions, and trends simultaneously. It enhances productivity for individuals and teams by providing a centralized view of their Twitter activity and enabling efficient scheduling and tracking.

Telegram is a fast and secure cloud-based instant messaging platform offering robust privacy features, large group support, file sharing, and cross-platform synchronization, making it a versatile communication tool.

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.

Andy is a free Android emulator that brings the full Android operating system experience to your Windows or macOS computer. It allows users to download, install, and run Android apps and games directly on their desktop, bridging the gap between mobile and PC environments.

Quicken is a comprehensive personal finance management software designed to help individuals manage their money, track spending, create budgets, and monitor investments. It provides a holistic view of your financial life, integrating various accounts and transactions.

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.