Qortex
Qortex is a web-based next-generation platform for collaboration and knowledge-building within your group or company. Special features are: use chat with your client, save into Qortex and share it there. Convert chats to posts to wiki entries for knowledge building. Share groups/folders with other companies/organizations. Full WYSIWYG editor for writing, or alternatively Markdown editor. To-Dos and acknowledgements for messages. Advanced task management, time estimates and time tracking. Multilingual entries with manual or on-the-fly machine translation.
Android and iOS client apps available. Can't sign up and try the app. Must fill in a request form and wait to be contacted by the Qortex team for a demo - despite the existence of a free pricing tier.
