There are just notes I've made when reading up on languages, frameworks, sites, or books.
After starting a few Coursera courses I realised I needed both Markdown and LaTeX support. To that end I've created a simple script that uses pandoc to do the necessary conversion, i.e.
pandoc <filename.md> -o tex/<filename.tex>
Conversion to TeX leaves LaTeX statements bounded by $$ .. $$ intact; super! Open the TeX file in TexShop, which should handle regeneration to PDF for you.