Json格式化
很全的json工具 http://www.bejson.com
比较智能的json工具https://www.json.cn/
Java
Java8 API https://docs.oracle.com/javase/8/docs/api/
MongoDB API https://docs.spring.io/spring-data/data-mongo/docs/1.7.0.RC1/reference/html/#mongodb-connectors
简明Python教程 http://wiki.jikexueyuan.com/project/simple-python-course
知乎Python库https://www.zhihu.com/question/24590883
UI
iconfont http://iconfont.cn/collections/detail?cid=918
学习资源
itsource http://www.itsource.com.cn/forum.php