Collabora Online supports editing your documents in real time with multiple other editors, showing high fidelity, WYSIWYG rendering and preserving the layout and formatting of your documents. My recommendation is to integrate Collabora Online with Nextcloud.
Apache Guacamole is a clientless remote desktop gateway. It supports standard protocols like VNC, RDP, and SSH. It can be used as a replacement for Citrix or TSplus terminal servers in SMEs. Apache Guacamole is also commercially supported.
In this post I will show you how to install Kali Linux Tools in Ubuntu 18.04 LXD Containers.
In this post I will show you how to install and configure LXD on Ubuntu 20.04 and 18.04.
(Update 21-05-2020: Ubuntu 20.04)