Fonts
identifont
search engine for font names
Templates
CSS
Codrops
demo and sourcecode for effects
MaxDesign
Bootstrap layouts, Listamatic, Listtutorial, Floattutorial, Selectutorial
CSS Zen Garden
one html doc, many CSS
CSS frameworks
Bootcards
cards-based UI with dual-pane capability add on to Bootstrap
Design Blogs
Design Reviver
great lists
Color Selectors
Color Blender
choose two colors, get the intermediate one
ColourLovers
color palettes
Color picker
full screen color
Button Generators
My Cool Button
button generator with shade and reflection effects, rounded borders
Brilliant Button Maker
small two colors buttons