I've built tldraw for HTML and Markdown pages (with encryption)
Yet another Pastebin clone, but the local vault and encryption add slight differentiation.

Agent-first encrypted sharing with curl workflow and client-side decryption keys.
Developers working with AI agents, security-conscious teams sharing artifacts
Magic Wormhole · OnionShare · PrivateBin
Yet another Pastebin clone, but the local vault and encryption add slight differentiation.
Yet another E2EE secret sharer when Privnote and SecretShare already exist.
Provider-agnostic alternative to Claude Artifacts with self-hosted comment threads.
Yet another habit tracker in a saturated market, encryption alone isn't differentiation.
Local library for AI HTML artifacts with one-click GitHub Pages sharing.
Open-source file-sharing with E2E encryption, but SendTransfer and Synology Moments exist.