
Writing and publishing
GrayCat Markdown
Write and preview Markdown, check publishing layouts, export to several formats, and sync documents through iCloud. AI tools are always optional.
Independent apps for Apple platforms
Write and publish with GrayCat Markdown, work with plain text in GrayCat Text, play local music with GraycatTunes, and read or organize documents in GrayCat PDF. KneeDaily helps knee sports-medicine professionals follow the literature.

Writing and publishing
Write and preview Markdown, check publishing layouts, export to several formats, and sync documents through iCloud. AI tools are always optional.

Plain-text editing
Edit plain-text files while preserving their encoding and line endings, with log viewing, search, comparison, and recovery. Very large files open as read-only previews.

Local music library
Play and organize your own music files on your Mac—no streaming account required.

PDF tools
Read original and translated pages side by side, with tools for OCR, merging, compression, annotations, signatures, and export.

Knee sports-medicine literature
Daily selections from the knee sports-medicine literature, with topic tracking, in-depth articles, PubMed search, and a personal library.
For professional literature reading and organization. It is not for diagnosis and does not provide treatment advice or clinical decision support.