Even though these two share the same Arabic noun: 'kafala', they actually refers to two totally different things. One refers to the migrant laborers monitoring system, while the other refers to the Islamic view of child adoption. Don't mix them up. The 'kafala' system has no relation (or share roots) with the meaning of 'kafala' in Islam. It's nothing but a name of the legislation of migrant laborers.
Thanks for your reply, but that's exactley what I don't want to do. I know about psql and I know how to write SQL statements, but what I'm looking for is a text-based interface that let me perform tasks (similar to what you can do with phpmyadmin) without writing SQL statements.
Deadlines. I want to be able to take courses and complete them whenever I have time.
Almost all Coursera's coursers have weekly deadlines. If you got busy for a couple of weeks during the course time you will fall behind. And the chances that you would get busy are quite high given that some of the courses last for more than three months.