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HumHub is a free social network software and framework built to give you the tools to make communication and collaboration easy and successful. It's lightweight, powerful and comes with a user-friendly interface. With HumHub you can create your own customized social network, social intranet or huge social enterprise application that really fits your needs. Boost your business, support your customers, teach your students or organize your football club. It's on you. HumHub is completely open-source. Take advantage of the work already done and even improve it. Every suggestion or help is welcome. With a powerful module system, you can extend HumHub by using third-party tools, writing your own or connecting existing software. Your server, your data, your rules. HumHub is a self-hosted solution and runs on almost every server. You are in full control of your data. We don't leave you alone. We support you with your projects and provide professional services around HumHub.

Zimbra 9 : Extensibility for Collaboration Superheroes! Users move seamlessly between desktop, mobile and tablet browsers with a consistent email and collaboration experience. Designed for extensibility and features best- in-class, out-of-the-box integrations with Slack, Dropbox and Zoom, with many more underway. Zimlet framework and APIs let you customize Zimbra to meet your specific requirements. Zimbra’s dependable server infrastructure for the security, privacy and data sovereignty Zimbra customers expect. Expect an easy upgrade process moving to Zimbra 9 — with no data migration. Zimbra 9's modern, responsive UI is built on Zimbra's dependable server infrastructure for the security, privacy and data sovereignty you expect from Zimbra. Unlike competitors with closed platforms, Zimbra 9 is flexible and extensible. Break free from Microsoft and Google and integrate with the 3rd party collaboration services you use today—Slack, Zoom, Dropbox and more.