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Products
Three apps. One idea: remove friction.
Each app does one job well, runs on your own machine and keeps your data where it belongs.
Lifetime updatesEvery new version, free
MIT licensePersonal and commercial use
Source includedRead it, audit it, build it
Real supportEmail and GitHub issues
File transfer
TailHop
Send text, images, folders and files between your PC and your phone, or between PCs, in a second. Drag, paste or share, and every device gets its own chat-style history.
- Works only inside your Tailscale network, with a second layer of pairing-key encryption on top
- Pair with a QR code, or a pairing code between PCs
- Drag and drop, Ctrl+V, Explorer “Send to”, command line and share sheet on Android
- Pause receiving without quitting; received files never run automatically
- English, Korean, Japanese and Simplified Chinese
Writing
ChoiMark
Write on the left, see it rendered on the right, with both panes scrolling together. Built with Tauri, so it opens instantly and stays light.
- GitHub-flavored Markdown, math (KaTeX), Mermaid diagrams, callouts and code highlighting
- Tabs, file tree, outline, folder search, quick open and a command palette
- Paste images straight into an assets folder; export to HTML or PDF
- Keeps your file’s encoding and line endings, saves safely and notices outside changes
- Per-user installer, no admin rights; registers .md and seven more extensions
AI coding
choitree
See what your AI agent is doing while it works. choitree adds a live panel to Claude Code with your project tree, git status and the exact file being edited.
- Git-aware file tree that unfolds only the folders that matter
- Marks the file Claude is working on, the tool in use and elapsed time
- Tokens, session cost, context usage and every usage limit at a glance
- Makes no network requests and stays inside the current project
- English, Korean, Japanese and Chinese