Open Source Office & Productivity Software
Mailspring
Mailspring is a desktop email client designed for macOS, Linux and Windows. It provides modern features like unified inbox, snoozing, templates, offline search, and support for Gmail labels. With Mailspring you can breath fresh air into your mailbox with support for various third-party IMAP provides such as Gmail, Office 365 and Microsoft Outlook. Mailspring intuitive features like read receipts, link tracking, send later, reminders, contact profiles and more.
Gitter
Gitter is an open-source instant messaging and chat room system for developers designed to make community messaging, collaboration and discovery as smooth and simple as possible. Gitter is provided as software-as-a-service and integrates with GitLab and GitHub repositories to make discussion around code even easier. With Gitter, you can can easily create, organise and grow your communities, inviting others to join just in one click. Over 1.5M users across 100K communities use Gitter to discuss code and development progress.
Habitica
Habitica is a free habit-building and productivity app that treats your real life like a game. The application can help you reach your goals and achieve better health, productivity and happiness. Habitica is built around a strong social network that will motivate you and inspire as you receive rewards and punishments based on performance of your tasks. Over 4 million people use Habitica to improve their life one task at a time.
Mailpile
Mailpile is an effort to reclaim private communication on the Internet. A project to rescue our personal lives from the proprietary cloud and prevent our conversations from being strip-mined for corporate profit and government surveillance. With Mailpile you can take e-mail back and make it yours.
XWiki
Developed for more than 10 years, XWiki is a long standing project trusted by individuals and high profile corporations. XWiki is a free and open source Wiki software written in Java and released under the GNU Lesser General Public License. XWiki provides a WYSIWYG editing, OpenDocument based document import/export, semantic annotations and tagging, and advanced permissions management fit for enterprise use. The extensible XWiki platform allow you to customaize and improve your Wiki as the content, userbase or usecase grows and evolves.
Sozi
Sozi is a free and open source, browser-based presentation software using SVG and JavaScript to create animated presentations. Unlike in most presentation applications, a Sozi document is not organised as a slideshow, but rather as a poster where the content of your presentation can be freely laid out. Playing such a presentation consists in a series of translations, zooms and rotations that allow to focus on the elements you want to show.
Odoo
Odoo is an open source suite of business management software tools including CRM, e-commerce, billing, accounting, manufacturing, warehouse, project management, and inventory management. Odoo provides it's user with open source ERP and CRM with a modern and elegant technical design, and an open architecture. The open framework allow a community of developers to provide top-notch usability that scales across all apps. Usability improvements made to Odoo will be automatically applied to all of our integrated apps and avalible for everyone using the product.
TagSpaces
TagSpaces is privacy aware, open source, cross-platform file browser. It helps organizing your files and folders with tags and colors.
Apache Airflow
Apache Airflow is a community created workflow management platform. The software is both free and open-source, and can be used to reduce complexity in organizations workflow. Apache Airflow is modular by nature, and has an architecture that makes it easy to customize to organizations specific needs. The software was was first developed at Airbnb to where it was used to programmatically author and schedule their workflows, allowing the organization to monitor them via the built-in Airflow dashboard.
Zim
Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images. Pages are stored in a folder structure, like in an outliner, and can have attachments. Creating a new page is as easy as linking to a nonexistent page.