Apps to Web-Based

SemanticScuttle is an open-source, self-hosted social bookmarking system that emphasizes structured tagging and collaborative knowledge management. It allows users to save, organize, and share bookmarks with a strong focus on semantic relationships between tags.

ERPNext is a comprehensive and user-friendly open-source Enterprise Resource Planning (ERP) software designed for businesses of all sizes. It integrates various business functions like accounting, CRM, manufacturing, sales, purchase, inventory, and project management into a single platform.

Restyaboard is a robust, open-source Kanban board alternative to Trello. It is designed for project management and team collaboration, offering a visual way to manage tasks, track progress, and communicate effectively.

Etherpad is a powerful, open-source web-based editor enabling real-time collaborative document creation and editing. Multiple users can work on the same document simultaneously, seeing each other's contributions instantly and identified by unique colors. Ideal for teams needing seamless co-authoring.

Contao is a versatile, free, and open-source content management system designed for creating professional websites, intranets, and online applications. It emphasizes accessibility, SEO-friendliness, and provides a robust framework for developers.

Scrapy is a powerful, free and open-source web crawling and scraping framework written in Python, designed for extracting structured data from websites efficiently and at scale.

Mantis Bug Tracker is a free and open-source, web-based issue tracking system designed primarily for software defect tracking. It offers a straightforward interface and a range of features suitable for managing projects and tracking the lifecycle of bugs and issues.

selfoss is a free and open-source web-based application that serves as a versatile RSS feed reader and a multi-source content aggregator, allowing users to collect, organize, and read content from various online sources in one place.

Tiki Wiki CMS Groupware is a free and open-source, all-in-one web-based application for collaboration and management. It combines a powerful wiki engine with comprehensive features for content management, project tracking, workflow, and office functions, making it a versatile solution for diverse organizational needs.

Mailpile is a free and open-source webmail client designed with privacy and encryption as core principles. It offers a self-hostable solution for managing your email with built-in support for PGP encryption and other security features, providing an alternative to traditional webmail services.

Roundcube is a free and open-source webmail client providing a modern, user-friendly interface to access and manage your email via IMAP. It is designed for easy self-hosting and offers extensive customization options.

pyLoad is a free and open-source download manager written in Python, designed to be lightweight and highly customizable. It supports numerous file hosting sites, captcha recognition, and can be accessed remotely via a web interface.

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.

Tiny Tiny RSS is a free and open-source web-based news feed reader and aggregator, enabling users to centralize and manage their RSS/Atom subscriptions effectively. It offers a clean interface, powerful filtering options, and is self-hostable for enhanced privacy and control over your data.

Kolab Community is a comprehensive, free, and open-source groupware suite designed for collaborative work. It provides integrated email, calendar, contacts, and tasks functionalities, empowering individuals and teams to communicate and manage their data efficiently and with a strong focus on data privacy.

Deluge is a free, open-source BitTorrent client offering a lightweight and cross-platform solution for downloading and sharing files. Known for its extensibility through plugins, it provides users with a customizable and efficient torrenting experience.

Transmission is a free and open-source BitTorrent client known for its simplicity, speed, and low resource usage. Designed to be lightweight and unobtrusive, it provides a straightforward interface for downloading and managing torrents efficiently across various operating systems.

Chive is a free and open-source web-based database management tool specifically designed for MySQL databases. It offers a fast and user-friendly interface for developers and administrators to easily manage database operations directly from their web browser.

Go Read is a free and accessible web-based ebook reader specifically designed for individuals with print disabilities. It offers a clean interface and essential features to improve the reading experience for visually impaired users.