Alternatives to TiddlyWiki

App to write, plan, collaborate, and get organised

To-do list

Native document editor

To-do list and time tracker

Gecko based web browser

Calendar for professionals and teams

Hierarchical note taking application

Web browser with built-in email client focusing on customization and control

Notetaking tool

Personal knowledge management and note-taking app

Knowledge management tool

Workstation to streamline your accounts, apps, and workflows