1. WriteFreely is an open-source, minimalist, federated, self-hosted blogging platform. It was built for and by Write.as and can be used to power a similar community or just a single blog.
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  2. Odoo (formerly OpenERP) is a suite of open-source business apps written in Python and distributed under the AGPL license, under the Open Core software business model. It is used by 2 million users worldwide to manage companies of all size.
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  3. TrueNAS (formerly FreeNAS) is an operating system that can be installed on virtually any hardware platform to share data over a network. TrueNAS is the simplest way to create a centralized and easily accessible place for your data.
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  4. Logseq is a platform for knowledge sharing and management. It focuses on privacy, longevity, and user control. Notice: the backend code will be open-sourced as soon as we’re sure that the backend service meets the security standards.
  5. Phabricator is a collection of open source web applications that help software companies build better software.

    Discontinued

    Effective June 1, 2021: Phabricator is no longer actively maintained.

    https://admin.phacility.com/phame/post/view/11/phacility_is_winding_down_operations/

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  6. OpenSource note-taking & archiving alternative to Evernote, Microsoft OneNote & Google Keep.

    Discontinued

    Paperwork currently is under development. As stated on the official website: "The software is not usable at this moment. Paperwork v2 is targeted to developers that would like to contribute to the project."

  7. The cPanel and WHM software package makes life easier for web hosts and the website owners they serve. It offers easy-to-use, powerful tools that perform essential tasks quickly, easily, and reliably.
    • FreeOpen Source
    • Online
    • Self-Hosted
    • Nextcloud
    • JavaScript
    • PHP
    • Cloudron
    Simple, modern & fast web-based email client. Modest system requirements, decent performance, simple installation and upgrade, no database required. All these make RainLoop Webmail a perfect choice for your email solution.
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  8. OpenNote was built to be an open web based alternative to Microsoft OneNote and Evernote .
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    • FreemiumOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Self-Hosted
    • PHP
    • Cloudron
    LimeSurvey (formerly PHPSurveyor) is an Open Source PHP web application to develop, publish and collect responses to online & offline surveys. Anonymous and Not-Anonymous survey, open and closed group of participant surveys, optional public registration for surveys.
  9. pgAdmin is the most popular and feature rich open source administration and development platform for PostgreSQL, the most advanced open source database in the world.
    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Self-Hosted
    • Cloudron
    Kimai is a free open source timetracker. It tracks work time and prints out a summary of your activities on demand. Yearly, monthly, daily, by customer, by project, by action …
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  10. AnonAddy is an open-source anonymous email forwarding service. The name AnonAddy is short for "anonymous email address". # Why should I use AnonAddy?
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  11. ProcessWire is a friendly and powerful open source CMS and CMF with an exceptionally strong foundation. With all custom fields, an easy-to-use jQuery-inspired API, and a powerful page selector engine, ProcessWire will rise to any task.
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  12. Leaflet is a modern open-source JavaScript library for mobile-friendly interactive maps. It is developed by Vladimir Agafonkin with a team of dedicated contributors. Weighing just about 28 KB of JS code, it has all the features most developers ever need for online maps.
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