Brett Terpstra
Titler
FreeAn OS X System Service to add titles and affiliate tokens to URLs (Markdown format) in selected text.
Mac
PopMaker
FreeOS X app for generating PopClip extensions.
Mac
Markdown Service Tools
FreeOS X Services for creating Markdown-formatted text.
Mac
nvALT
FreeEfficient Note-Taking with nvALT for Mac
Mac
Marked
Trial versionMarked: Enhanced Markdown Preview for Mac
Mac