Pandoc
I "love" how many comments are one person praising pandoc for helping them in some workflow, and then commenters ripping into them for not using some other tool. I wonder if there's a corollary to some internet rule that the more generally  useful a tool is, the more detractors will push for other tools to be used? It would help explain why programming language discussions get so contentious.<p>Pandoc is seriously a great tool! I love the way it's designed and have found it useful off and on over the years. Truly marvelous for making information available in any needed format.