15套漂亮的图标集免费下载
1) Pixelo Philia
2) spherical-social-bookmarking-icons-set
3) Iconika Red Icons
4) Red Button Social Media Icons
7) Socialize Icons Set
Black-Square-Social-Media-Icon
9) Phoney Icons
10) Handy Light Icons
11) twestival-推ter-birds-icon-pack
12 ) General Vector Icons
13) Colorful Stickers Icons Set
14) Pastel SVG Icons
15) tweety-free-推ter-bird-icon-pack
ajax 
openkk 
jopen