There are several websites that offer online study and certifications all around the world. Some charge fee for the online course, while some provide certificate free of cost. Here is a list of both websites where you may apply for this purpose:
Coursera:
A very famous website for online study is Coursera that contains the biggest online library with the collaboration of sixteen renowned universities. It has more than one million students across the globe. Join for free www.coursera.org
The Open University:
This site has been designed for you to pass any course as per your interest without any fee. You can see, the course which has the high rating, shows that its demand is high. Visit www.open.edu/openlearn/
Khan Academy:
Khan Academy has recorded a number of video lectures, which are available for you without any fee. However, there is no reading in this course. You can watch free videos and learn in this way. Follow the official site, i.e. www.khanacademy.org/
UMass Boston Open Courseware:
UMass invites you to study online a wide range of subjects, including science, technology, social sciences and Math, etc. They follow a proper discipline and send the students timely assignments, quizzes and exams. For more details, visit their official website: ocw.umb.edu/
MIT Open Courseware:
MIT offers you to download all the study stuff free and you can learn independently at your home. Check ocw.mit.edu/index.htm
Free-Ed:
It is a big platform where you can quench your thirst for study and a particular benefit is that you can join their Facebook community for home based group study with the other students enrolled in its courses. Visit www.free-ed.net/free-ed/
Udemy:
Udemy presents free as well as paid courses related to various disciplines. It is the best website to learn web development and designing from the scratch. You can search for the desired course and its details at www.udemy.com/
Open Yale Courses:
This is another big online portal for free education. It proposes different courses and certificates. It is easy to navigate website and becoming popular rapidly. Check oyc.yale.edu/
ALISON:
ALISON stands for Advanced Learning Interactive Systems Online. As from the name is obvious, it is for eLearning and provide a certificate at the completion of the course. There is a negligible fee for accessing ALISON Manager, which is a control panel for the tutors. It is worthwhile platform based in Ireland. See details at alison.com/
University of the People:
It is indeed a university of the people, where they can learn and enhance their knowledge free of cost. You can enroll in any course of your own choice and also get a degree online. There is a minimal fee charged for Application Processing and Examination Processing. Find details at uopeople.edu/groups/tuition-free-online-degree
Open Culture:
It invites you to select any course from a collection of 1100 courses offered by the valuable universities and educational institutions worldwide. You can download study material of the renowned universities from Open Culture Website, i.e. www.openculture.com/freeonlinecourses
Google Code University:
This is the best choice to learn computer languages and Android App development, etc. it has collected worthy stuff from different educational institutions. Official link is developers.google.com/university/