Airtable
Managing notes for a single project (per base).
Notion
A good balance between databases and blank note pages.
Obsidian
At least somewhat tech-savvy people who love to create unique workflows and continuously tinker
Omnivore
Highlighting web articles/PDFs and saving them for later
Superhuman
Managing multiple email inboxes
Evernote
File management and simple notetaking without any fancy features.
Zapier
Automating everything and creating workflows between different apps.
Google Pinpoint
Searching large batches of documents.
Alfred - Productivity App for macOS
Quick file searching, bookmarks, text snippets
Wayback Machine
Archiving websites
Summarize.tech
Quick research