1. Format online
tool.oschina.net/codeformat
2. Alibaba Vector map
www.iconfont.cn/ www.easyicon.net/iconsearch/…
3. Encoding/decoding
Tool.chinaz.com/tools/urlen…
4. Original design/Mind mapping
www.processon.com/
5. Online interviews
www.showmebug.com/
6. Online Http request testing
www.sojson.com/http/test.h…
7. Graph tools
www.gaoding.com/introductio…
8. Free material pictures
www.pexels.com/zh-cn/ pixabay.com/ unsplash.com/
9. Code hosting
Gitee.com/ github.com/ www.pssdss.com/ (not fully open source)
10. The Android open source libraries
www.open-open.com/lib/view/op…
11. Layout Color (Android)
www.materialpalette.com/
12. Control styles (CSS, Android, etc.)
angrytools.com/
13.Bmob
www.bmob.cn/
14. Them
www.udacity.com/ www.coursera.org/ www.imooc.com/ www.xuetangx.com/ www.edx.org/
The above are some websites I often use. If you have any good websites, you can recommend them to me. Thank you.