A very useful utility to add tabs to the Finder in addition to other tweaks like listing folders above files in the file lists.
Syndicated
TotalFinder
Bookshelf Porn
Exactly what the site's title says it is – pictures of amazing bookshelves. Yeah it's nerdy – that's why I like it.
Font metrics and vertical space in CSS
"If you’ve ever wondered why some fonts look smaller than others at the same typeset size, or why the vertical space between lines of text is such a guessing game, this post is for you."
DevCheatSheet.com
Cheat Sheets & Quick Reference Cards for Developers