Apps to Extensible by Plugins/Extensions

OneSwarm was a file-sharing client focused on privacy and anonymity, designed to operate within a darknet or a friend-to-friend network.

X-Chat 2 for Windows is an unofficial, open-source build of the popular X-Chat IRC client, specifically tailored for the Windows operating system. It provides a robust platform for connecting to various IRC networks and engaging in real-time communication with other users.

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.

Caret is a robust and feature-rich text and code editor designed for the Chrome platform, offering advanced editing capabilities, syntax highlighting, and offline functionality for developers and writers.

ExpressionEngine is a versatile and powerful content management platform designed for building dynamic websites, blogs, and web applications with a focus on flexibility and developer control.

RAD Studio is a comprehensive integrated development environment (IDE) for building native applications across multiple platforms including Windows, macOS, iOS, Android, and Linux. It supports development with both Delphi (Object Pascal) and C++.

Simple Machines Forum (SMF) is a powerful and free open-source forum software designed to provide a robust platform for online communities. It offers a comprehensive set of features for building and managing dynamic message boards.

MyBB (MyBulletinBoard) is a free, open-source forum platform written in PHP and utilizing MySQL. It provides a robust and extensible solution for building online communities, offering features like integrated spam protection, user management, and a plugin system for customization.

Futuramo Time Tracker is a robust time tracking application designed to enhance productivity and manage work time effectively. It offers a suite of features for individuals and teams to monitor activities, analyze performance, and streamline time management processes.

Speed Dial is a versatile browser extension designed to replace your default new tab page with a highly customizable visual dashboard, offering quick access to frequently visited sites, bookmarks, and browsing history for enhanced navigation and productivity.

ArchiCAD is a powerful BIM software suite designed for architects, engineers, and construction professionals. It facilitates comprehensive building information modeling, design, and documentation workflows for projects of all scales on both Windows and macOS platforms.

RapidWeaver is a powerful, all-in-one web design platform exclusively for macOS, empowering users to create stunning, responsive websites without requiring extensive coding knowledge. It offers a visual drag-and-drop interface combined with robust features for building modern, dynamic web presences, making web development accessible to both beginners and experienced designers.

Psi+ is a robust, cross-platform XMPP/Jabber client tailored for users who prioritize control, privacy, and extensibility. As a development branch of the classic Psi client, it offers advanced features for secure and customizable instant messaging.

ABBYY Lingvo Dictionaries for desktop and mobile devices provide powerful tools for language translation, vocabulary acquisition, and language mastering. Offering comprehensive dictionaries, contextual translations, and versatile search capabilities, Lingvo supports a multitude of languages for individuals and professionals.

rxvt-unicode, often abbreviated as urxvt, is a highly customizable and lightweight terminal emulator known for its performance and extensive feature set provided through plugins. It's a fork of the original rxvt and is a popular choice for users seeking a fast and highly configurable command-line interface.

Visual Paradigm is a comprehensive modeling and design tool for software development, enterprise architecture, and business process analysis. It supports a wide range of diagramming notations including UML, BPMN, ERD, and more, facilitating code generation, reverse engineering, and team collaboration.

Adobe Bridge is a powerful digital asset management application that helps you organize, browse, locate, and preview your creative assets quickly and efficiently. It is a complete solution for managing photos, videos, and other media files, offering robust features for metadata management, batch processing, and seamless integration with other Adobe Creative Cloud applications.

Mylio helps you organize, protect, and access your photos and videos across all your devices without relying solely on cloud storage. It leverages a unique approach to keep your entire library synchronized and accessible, offering powerful organization, editing, and sharing tools.

SynWrite is a comprehensive and free source code editor for Windows, serving as an excellent Notepad replacement with robust features for various programming and web development tasks. It's designed for performance and extendibility, making it suitable for both novice and experienced developers.

Scribes is a free and open-source minimalist text editor designed for programmers and writers who value simplicity and efficiency. It provides a clean interface with essential features like syntax highlighting, autocompletion, and extensibility through plugins, making it a lightweight yet powerful tool for various coding and writing tasks.

WeeChat is a highly customizable, free and open-source command-line based chat client. Designed for efficiency and portability, it supports multiple protocols including IRC and XMPP, making it a versatile tool for connecting to various networks.

Textadept is a powerful, free, and open-source text editor designed for programmers. Focusing on speed and extensibility, it offers a minimalist interface while providing robust features like syntax highlighting, code formatting, and a built-in terminal, all heavily customizable through Lua scripting.

RJ TextEd is a powerful freeware text and source code editor for Windows, offering comprehensive features for web development, programming, and general text editing.

FVD Speed Dial is a browser extension that transforms your new tab page into a visually appealing and highly functional speed dial. It allows users to organize bookmarks, synchronize data across devices, and customize their browsing experience with various themes and layouts.

qutIM is a free and open-source, multi-protocol instant messenger designed for connecting to various networks including ICQ, Jabber, Mail.Ru, IRC, and VKontakte. It offers a unified interface for managing multiple accounts and conversations.

ISPConfig is a robust, open-source hosting control panel for Linux, designed for service providers, resellers, and individuals. It simplifies the management of web servers, mail servers, DNS servers, and more, offering a comprehensive suite of tools via a user-friendly web interface.

OpenProject is a powerful, web-based open-source project management software designed for teams of all sizes. It offers comprehensive tools for managing projects, tasks, teams, and communication in one centralized platform. Ideal for organizations prioritizing collaboration, flexibility, and data control.

Portable-VirtualBox allows you to run virtual machines directly from a USB drive without requiring an installation on the host computer. It provides a convenient and portable way to access different operating systems and applications.

CKEditor is a powerful open-source WYSIWYG HTML editor designed to be embedded into web pages, providing developers with a robust solution for enabling rich text editing capabilities for their users. It transforms simple textareas into fully-featured content creation environments.

Xabber is a free and open-source XMPP (Jabber) client for Android. It provides secure and reliable instant messaging with support for various XMPP features, including encryption, group chat, and decentralized communication. Leveraging the open XMPP protocol, Xabber offers a privacy-friendly alternative to centralized messaging platforms.