JournalBook - A truly private, offline-first, personal journal
draw.io - Online diagramming application
My Mind - All your notes, bookmarks, inspiration, articles, and images in one single, private place, enhanced with artificial intelligence.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
myReach.io - Your second brain – a personal ChatGPT for all your documents, PDFs, notes and articles, so you can search for them the way you think.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.