by Ryan Irelan
CriticMarkup is a way for authors and editors to track changes to documents in plain text. As with Markdown, small groups of distinctive characters allow you to highlight insertions, deletions, substitutions and comments, all without the overhead of heavy, proprietary office suites.
CriticMarkup works with Markdown, MultiMarkdown and even just good ol’ HTML. But, really, it’ll work with anything plain text documents.
Also available are text editor plugins to help you get started and make writing the syntax faster. Everything is available on the CriticMarkup site.
If you want to learn more about using Markdown (my preferred way to write everything, even this blog post), our 30 minute training video on Markdown will teach you everything you need to know to get started, including some popular tools.