1. Infinitely nested files&folders
   1. Generic file link
   2. Subfolder A
      1. Some file
      2. Then a folder
         1. Some other file
         2. And another
            1. File 1
            2. File 2
            3. File 3
            4. File 4
            5. File 5
            6. File 6
            7. File 7
            8. File 8
            9. File 9
            10. File X
      3. File 3
      4. File 4
      5. File 5
      6. File X
2. Done in pure CSS
   1. Using hidden checkbox to change the state of folders
   2. No JavaScript for list building or operation
3. And no bloody jQuery
   1. How to wean yourself off jQuery, if you're still using it
4. Icons based on ending of link's HREF
   1. Generic file
   2. PDF
   3. HTML
   4. JavaScript
   5. CSS
5. Credits and inspiration
   1. Martin Ivanov
   2. Ryan Seddon
6. ... oh and one more thing...
   1. Also use it to visualise JSON
   2. Click here to try +JSON