http iconfinder com
http://iconfinder.com/
iconmonstr
http://iconmonstr.com/
分享很不错的10个UI图标资源站 慕课文章
http://www.imooc.com/article/6469?block_id=tuijian_wz
Noun Project
https://thenounproject.com/
iOS Icon Gallery
http://iosicongallery.com/
32 500 Free Icons The Largest Icon Pack Ever
https://icons8.com/
Fontello icon fonts generator
http://fontello.com/
图标工场 移动应用图标生成工具 一键生成所有尺寸的应用图标
http://icon.wuruihong.com/