Index
PKM and second brain startup ideas
This shelf holds 12 startup ideas about PKM and second brain. Average Hotness is 3.12, on a 1 to 5 scale that mixes pain, willingness to pay, public-thread demand, the gap left by current tools, build effort, and how fresh the evidence is. Scores cool when no newer evidence is added. The strongest score here is 4.05 for Dementia Conversation Cue Cards: Record a calm answer once for each repeated question, and get the right script instantly on your phone or speaker. Also on this shelf: Time-Machine Version History for Obsidian, Evidence Vault for Teacher Employment Disputes, Decision Log for Family Caregiving, and Active-Recall Quizzes From Recorded Lectures. The most common way these products charge is Subscription (4 of 12). 3 are aimed at a business buyer and 9 at an individual. 7 look weekend-easy, 4 moderate, and 1 hard. Open a page for the complaint, the source link, and the gaps. The ideas are free to build. The agent prompt is the part that costs a credit.
Dementia Conversation Cue Cards
Record a calm answer once for each repeated question, and get the right script instantly on your phone or speaker.
Time-Machine Version History for Obsidian
Git-powered snapshots with a visual diff and one-click restore, for users who don't know git.
Evidence Vault for Teacher Employment Disputes
Timestamped incident logging plus templates to formally contest a reprimand under union rules.
Decision Log for Family Caregiving
A shared record of care decisions and the reasons behind them, so relatives stop relitigating every choice.
Active-Recall Quizzes From Recorded Lectures
Turn lecture and meeting recordings into retrieval-practice questions instead of transcripts you never reread.
Respite Care Handoff and Quality Check
A mandatory handoff checklist for temporary caregivers, plus vetting of respite providers before you book.
Context Snapshots for On-Call Engineers
Save your working context (logs, services, hypotheses) before switching and restore it in one click.
Multi-Vault Navigator for Obsidian
Browse and search several Obsidian vaults in one window while keeping their sync and privacy separate.
Universal Recall Search for Everything You Saved
Semantic search across notes, bookmarks, screenshots and PDFs, built around 'what was I looking for?'.
Focus Workspace Mode for the Obsidian File Explorer
A polished, supported 'show only my active notes' explorer, beyond the DIY plugin.
Resurfacing Engine for Forgotten Hub Notes
Spaced-repetition nudges that bring back the hub notes gaining the most new links.
PDF Annotation Inside Obsidian
Read and highlight PDFs in Obsidian with two-way sync of highlights into your notes.
Questions
How many startup ideas are in PKM and second brain?
There are 12. The highest Hotness is 4.05 for Dementia Conversation Cue Cards.
Which idea should a founder open first?
Open Dementia Conversation Cue Cards if you want the strongest score on this shelf. If you want a shorter build, use the weekend-easy collection and come back to the ideas that match both.
What is free here?
Every idea page, the sources, and this index are free. An agent PRD costs one credit. The first credit comes with an email signup. Building any of these ideas is allowed.