Free Resources
Icons
Flaticon
This site has icons on almost everything and they are all creative commons licensed.
Noun ProjectÂ
Also has thousands of icons under creative commons.
iconmonstr
Completely free icons
Color
Adobe Color CC
This website will help you develop your own color theme or you can use it find themes already created by others.
Fonts
Dafont.com
Tons of free fonts in almost every imaginable style with differing license restrictions.
Font Squirrel
Many, many free fonts nicely arranged by type and style. All are free for any use.
Music/Sound
Audionautix.com
Bensound.com
incompetech.com
joshwoodward.com
freemusicarchive.org
freesound.org
for sound effects. Be sure to check licenses on these sounds, as not all sounds available on this site are completely royalty-free. You also need an account to download them.
Channel full of free youtube music
You need a Sound Cloud account to download music from here.