Coggle is Mind Map tool, and it is simple and easy to sign up for.
This article shows you you can sign up for GoConqr and setting up the account before you can start creating Mind Map.
Outlook creates a "focused" inbox which can often hide messages you actually want to see. It's part of Microsoft's permission to scan your email (ultimately hoping to target you with online ads based on your email correspondence.
Adobe Reader DC has numerous tools for annotating PDFs.
You can add marks to insert, replace, and delete text. Click headings below to display details; click again to collapse.
Adobe Reader lets you mark up PDFs easily. After you add a highlight, you can insert comments about it.
Adobe Reader is a free app available for a wide variety of computers and other devices.