ClingNote
A local-first Windows notes app that attaches notes to files, applications, and browser tabs and automatically shows the relevant notes when you switch back to work.
Problem it solves. Keeps contextual notes tied to the specific file/app/tab so you don't lose the 'why' behind past decisions when reopening work.
Who pays. developers and knowledge workers who reopen old code, queries, spreadsheets, or reports
Market. productivity / notes app (Windows desktop)
How it makes money. Free basic notes; automatic switching is an optional $10/year paid feature
Claimed. $10/year feature
Market hub. Note-Taking Software
The post includes a working product URL, concrete technical details (uses NTFS file ID for file recognition), the founder answered technical and adoption questions, and commenters report coworker adoption — no upvoted comments call it fake or promotional.