Inkdrop

Inkdrop is a cross-platform note-taking app for developers and Markdown-first users who want a fast place to write tech notes, task logs, meeting notes, and code snippets.

Key capabilities include:

• A Markdown editor built for technical writing, with multi-language code syntax highlighting, multi-cursors, line numbers, and support for extensible Markdown rendering (including options like KaTeX and Mermaid via plugins)
• Cloud sync with end-to-end encryption, plus offline access for reading and writing notes without a connection
• Organization tools such as nestable notebooks, tags, pin-to-top, and a task progress view using note status
• A customization ecosystem with 100+ plugins, themes, configurable keybindings (including Vim/Emacs/Sublime options), and browser extensions for clipping web pages to Markdown

Pricing: Paid subscription with a 30-day free trial (no credit card required). Pricing is $9.98/month or $8.31/month billed annually ($99.80/year).

What makes it notable: it combines a developer-grade Markdown workflow (syntax highlighting, extensible renderer, keyboard customization) with encrypted sync and a large plugin ecosystem across macOS, Windows, Ubuntu, iOS, Android, plus Chrome and Firefox clipping extensions.