Linux Softwares to Knowledge Base structuring

UserEngage is a comprehensive real-time customer engagement and marketing automation platform designed to help businesses of all sizes improve conversions and build stronger relationships through unified communication channels and intelligent automation.

OutWiker is a portable, tree-structured note-taking application that allows users to organize information hierarchically. Functioning as a personal wiki or outliner, it provides a simple yet powerful way to manage notes, documents, and ideas in a flexible, offline environment.