Heynote

Heynote is a free, open-source scratchpad and note-taking application designed for developers and productivity-focused users. It provides persistent text buffers for storing temporary notes, code snippets, calculations, and other working information. The editor organizes content into individual blocks, each supporting its own programming language or editing mode. Users can write and format code with syntax highlighting for numerous languages, including Python, JavaScript, JSON, and Markdown. Heynote includes a calculator mode, currency conversion, inline images, and multi-buffer searching. Its editing tools support multiple cursors, automatic formatting, and customizable keyboard shortcuts. Available for Windows, macOS, and Linux, it combines the simplicity of a scratchpad with specialized development utilities.