Video tutorials:
https://tutsgalaxy.com/
Packt Publications
https://www.packtpub.com/packt/offers/free-learning
https://www.packtpub.com/mapt/book/networking_and_servers/9781787120099/6/ch06lvl1sec39/sending-an-sms
https://www.freetechbooks.com/packt-free-ebooks-b81.html
SitePoint
https://www.sitepoint.com/
Stackcocial (shop for Stackskills)
https://stacksocial.com/
https://stacksocial.com/free
Free All-About-Android Coding Bundle
- Using Java for Android & Advanced Applications
- Publish an Android Game App
- Android Material Design: Learning Through Example
- Advanced Android Programming Skills
Stackskills (account required, access to purchased content)
https://stackskills.com/courses/html-5-from-the-ground-up/lectures/1002775
https://stackskills.com/courses/chinese-made-easy/lectures/644144
https://stackskills.com/courses/enrolled
StoneRiver eLearning (account required, access to purchased content)
https://stoneriverelearning.com/
Sitepoint (account required)
https://www.sitepoint.com/premium/courses/creating-a-login-portal-with-bootstrap-4-2994/lesson/1/step/2
Bootstrap
https://getbootstrap.com/docs/4.0/getting-started/introduction/