Univention Corporate Server is a preconfigured, 100% open source Linux server and IT management system. It is free of charge and perfect for providing Microsoft Server-like services on the cloud or on the premises, to run and operate corporate IT environments with Windows- and Linux-based clients and to extend those environments with proven enterprise software, also either on the cloud or on the premises.
 
UCS most important characteristics are: 
Active Directory-like domain services compatible with Microsoft Active Directory; a mature and easy-to-use web-based management system for user, rights and infrastructure management; a scalable underlying concept suited for single server scenarios as well as to run and manage thousands of clients and servers for thousands of users within one single UCS domain; an App Center providing single-click installation and integration of many business applications from third parties and Univention; management capabilities to manage Linux- and UNIX-based clients; command line, scripting interfaces and APIs for automatization and extension.
 
Its features include: 
User, group and rights administration, an integrated IP management (DNS, WINS, DHCP), file and printer services. AD Takeover allows the migration of a Microsoft AD to UCS via Samba. AD Connection either integrates UCS in an AD domain or allows automatic sync of the AD and UCS. UCS has an integrated virtual machine manager (UCS Virtual Machine Manager, in short UVMM). The App Center provides further UCS components and numerous Open Source products from popular third-parties applications such as ownCloud, Kopano etc., an increasing number of them are Docker-based and integrated in UCS' central identity management. Hybrid cloud management for OpenStack and Amazon EC2 and is based on Debian GNU/Linux 8 (Jessie).

Univention Corporate Server is a preconfigured, 100% open source Linux server and IT management system. It is free of charge and perfect for providing Microsoft Server-like services on the cloud or on the premises, to run and operate corporate IT environments with Windows- and Linux-based clients and to extend those environments with proven enterprise software, also either on the cloud or on the premises.

Univention Corporate Server - Easy administration of your IT infrastructure

Diaspora is distributed and contextual social networking. It is decentralized and provides freedom and privacy. Instead of everyone’s data being held on huge central servers owned by a large organization, diaspora* exists on independently run servers (“pods”) all over the world. You choose which pod to register with, and you can then connect seamlessly with the diaspora* community worldwide.
 
In diaspora* you own your data. You don’t sign over rights to a corporation or other interest who could use it. In addition, you choose who sees what you share, using Aspects. diaspora* pioneered the concept of aspects, which means you can organise your contacts according to their role in your life. This means you can share something just with family members or work colleagues, knowing that no one you don’t want to will be able to see what you post.

Diaspora is distributed and contextual social networking. It is decentralized and provides freedom and privacy. Instead of everyone’s data being held on huge central servers owned by a large organization, diaspora* exists on independently run servers (“pods”) all over the world. You choose which pod to register with, and you can then connect seamlessly with the diaspora* community worldwide.

Diaspora - Distributed and contextual social networking

Citus is a distributed database that scales across commodity servers using transparent sharding and replication. Citus extends the underlying database rather than forking it, giving developers and enterprises the power and familiarity of a relational database. As an extension, Citus supports new PostgreSQL releases, and allows you to benefit from new features while maintaining compatibility with existing PostgreSQL tools.
 
Citus is a PostgreSQL extension and not a fork. It is scalable across multiple machines through sharding and replication. It supports distributed engine for query parallelization.

Citus is a distributed database that scales across commodity servers using transparent sharding and replication. Citus extends the underlying database rather than forking it, giving developers and enterprises the power and familiarity of a relational database. As an extension, Citus supports new PostgreSQL releases, and allows you to benefit from new features while maintaining compatibility with existing PostgreSQL tools.


Citus - Scalable PostgreSQL for multi-tenant and real-time workloads

Botpress is an open-source bot creation tool written in TypeScript. It is powered by a rich set of open-source modules built by the community. Botpress is like, the WordPress of bots; anyone can create and reuse other people's modules. It is the ultimate open-source conversational platform with built-in natural language processing (NLU), easy-to-use graphical interface and dialog manager.

Botpress - The Ultimate Bot Framework

Talkyard is a Forum software, brings together the best from StackOverflow, Discourse, Slack etc. It helps people find help "instantly", in Question & Answers topics, Discuss, upvote and choose the right things to do. It also provides support to do team chat, Add embedded comments to the blog.

Talkyard - Forum software, brings together the best from StackOverflow, Discourse, Slack, Reddit, Disqus

This is a FOSS project for asset management in IT Operations. Knowing who has which laptop, when it was purchased in order to depreciate it correctly, handling software licenses, etc. It helps to see which assets are assigned, to whom, and their physical location. Check them back into inventory with one click, or click through to see the asset's complete history. Seeing what assets are currently deployed, pending (brand new awaiting software installs, out for repair), ready to deploy, or archived (lost/stolen, or broken) is quick and easy.

Snipe-IT - Open Source Asset Management System

HumHub is a feature rich and highly flexible OpenSource Social Network Kit written in PHP. It provides support to build Social Intranets, Enterprise Social Networks, Private Social Networks. Its social features include Commenting, Like, Following, Mentioning, Tags, OEmbed Support. The communication in HumHub works with spaces. A space can literally be anything, a project, a group or just a simple topic. For every space you can invite multiple users and make up your own access rights and rules.

HumHub - Open Source Social Network

Forem is open source software for building communities. Communities for your peers, customers, fanbases, families, friends, and any other time and space where people need to come together to be part of a collective. dev.to (or just DEV) is hosted by Forem. It is a community of software developers who write articles, take part in discussions, and build their professional profiles. 

Forem - For empowering community

K6 is a load testing tool built for engineering teams. The k6 API and CLI are easy-to-use, flexible and powerful. Create tests faster with our test builder, recorder or converters. Automate your tests to ensure that your infrastructure and application remain performant. Write tests in Javascript that mimic real-world scenarios. It has HTTP/1.1, HTTP/2, WebSocket and gRPC protocol support. 



K6 - A modern load testing tool, using Go and JavaScript

Imageflow is a high-performance image manipulation for web servers. Includes imageflow_server, imageflow_tool, and libimageflow . 
 
imageflow_tool is a command-line tool for experimenting, running batch jobs, or when you want process isolation. Up to 17x faster than ImageMagick. Also produces smaller files at higher quality. imageflow_server can run JSON jobs or manipulate images in-flight (e.g./bucket/img.jpg?w=200) for direct use from HTML. Source images can reside in blob storage, on another server, or on the filesystem.

Imageflow is a high-performance image manipulation for web servers. Includes imageflow_server, imageflow_tool, and libimageflow . 

Imageflow - High-performance image manipulation for web servers

Crater is an open-source web & mobile app that helps you track expenses, payments & create professional invoices & estimates. It provides support to create Professional invoices, Estimates, Track Expense and payments, Input different tax types & calculate them as simple or compound tax per-item or directly on invoice total. 

Crater - Open Source Invoicing Solution for Individuals & Businesses

Joplin is a note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor. The notes are in Markdown format. Notes exported from Evernote via .enex files can be imported into Joplin, including the formatted content (which is converted to Markdown), resources (images, attachments, etc.) and complete metadata (geolocation, updated time, created time, etc.). Plain Markdown files can also be imported. Full text search is available on all platforms to quickly find the information you need. The app can be customised using plugins and themes, and you can also easily create your own.
It maintains Revisions (Note history), Synchronisation with various services, including Nextcloud, Dropbox, WebDAV and OneDrive. End To End Encryption, File attachment, Inline display of PDF, Geo-location and Multiple language support.

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor. The notes are in Markdown format. 

Joplin - A note taking and to-do application with synchronization capabilities for Windows, macOS, Linux, Android and iOS

Spacedrive is an open source cross-platform file manager, powered by a virtual distributed filesystem written in Rust. Organize files across many devices in one place. From cloud services to offline hard drives, Spacedrive combines the storage capacity and processing power of your devices into one personal distributed cloud, that is both secure and intuitive to use.
Create photo albums that you'll never lose, effortlessly catalogue terabytes of video, move files between devices dynamically to optimize space and redundancy, generate preview media for easy viewing, automate security and encryption. Beyond being an opinionated, swiss army knife file explorer, Spacedrive is a personal database. It identifies your files uniquely, understanding more file types than any operating system.&nbsp;
Spacedrive is not a storage provider, Spacedrive is simply a database that exists on top of existing storage layers, from cloud services like Dropbox, Google Drive and iCloud to physical devices and external drives you already own. It doesn't provide you more storage, rather a supercharged view of your existing storage.

Spacedrive is an open source cross-platform file explorer, powered by a virtual distributed filesystem written in Rust.



Spacedrive - Cross Platform File Explorer

AppFlowy is an open-source alternative to Notion. You are in charge of your data and customizations. AppFlowy enables you to create apps that suit your needs. It's built on a community-driven toolbox, including templates, plugins, themes, and more.
AppFlowy helps to visualize items in a database moving through stages of a process, or grouped by property. It also provides Kanban Board to scope projects and visualize your data. It can build detailed lists of to-do&rsquo;s for different projects while tracking the status of each one.

AppFlowy is an open-source alternative to Notion. You are in charge of your data and customizations. AppFlowy enables you to create apps that suit your needs. It's built on a community-driven toolbox, including templates, plugins, themes, and more.

AppFlowy - Open-source alternative to Notion

eyeOS is a disruptive desktop entirely usable from a web browser. eyeOS as a RIA (Rich Internet Application Framework). It has been completely developed with open technology and widely accepted standards such as PHP, MySQL, JavaScript, Qooxdoo, log4php, PHPUnit, OpenOffice and others, enabling the system to function on a common web server without any modifications, and using any standard browser without any additional plug-ins installed.
 <UL>
	<LI>Designed as a much more social desktop. The new version introduces new, easy and intuitive ways to share files, calendars and more between users and groups</LI>
	<LI>It has by default with applications to create and work with Office files</LI>
	<LI>It aims to be a great stable suite for comfortable online work, both individually and with other users simultaneously.</LI>
	<LI>Creating RIA (rich Internet applications) is easy and fast. eyeOS is a framework that combines JavaScript and PHP</LI>
	<LI>Access your documents from anywhere any device</LI>
	<LI>Control the access rights for each user</LI>
 </UL>

eyeOS is a disruptive desktop entirely usable from a web browser. eyeOS as a RIA (Rich Internet Application Framework). It has been completely developed with open technology and widely accepted standards such as PHP, MySQL, JavaScript, Qooxdoo, log4php, PHPUnit, OpenOffice and others, enabling the system to function on a common web server without any modifications, and using any standard browser without any additional plug-ins installed.

eyeOS - Cloud Computing Operating System

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