Ledge

Runnable Markdown notes for developers and DevOps. Run a code block in place and its output streams in beneath it. Free and open source, for Mac, Linux, Windows, iPhone, and Android.

Highlights from the product’s site

• Each note has its own shell
• Keep your notes on a server
• The same notes on your phone
• Run blocks on other machines
• Put notes side by side

Open source: the code is at github.com/ledgesh/ledge.

First shown on Hacker News on 29 September 2026 as “Ledge.sh – Runnable Markdown Notes”, where it reached 205 points and 88 comments. Read the discussion.