https://packagist.org/packages/guzzlehttp/guzzle
https://github.com/chriskacerguis/codeigniter-restserver
https://github.com/bcit-ci/codeigniter3-translations
https://github.com/jamierumbelow/codeigniter-base-model
https://github.com/avenirer/CodeIgniter-MY_Model
https://github.com/philsturgeon/codeigniter-curl
https://github.com/goFrendiAsgard/No-CMS
https://github.com/havok89/Hoosk
https://github.com/thephpleague/csv
https://github.com/PHPOffice/PHPExcel
https://github.com/segmentio/analytics-php
https://github.com/forecho/awesome-yii2
https://github.com/amphp/socket
https://github.com/alimovalisher/Socket
https://github.com/ueaner/soap
https://github.com/tightenco/
类似悟空的国外网站：https://www.freelancer.com/
参考：
https://github.com/search?q=CodeIgniter
https://blog.csdn.net/qinpanke/article/details/78043749
YII2开源商城：http://www.yincart.com/# 作者github: https://github.com/yinhe
讲述框架设计 https://developmentmatt.com/
