@burcidi-- Meditation is very much a part of Islam but it's usually not referred to as such. The meditation that takes place in Islam occurs through worship. I'm a Muslim and I pray five times a day and I also use prayer beads. But I don't do any of this with the intention to meditate. Meditation happens on its own while I'm praying.
The five daily prayers are a great form of meditation because like the article said, it involves repeating prayers and movements which helps to calm the mind. We are also required to try our best not to think anything while praying and concentrate on our prayers and Allah. So there is definitely a sense of calmness and peace that comes with Islamic prayers.
I also love using prayer beads to recite God's name and glorify Him. Since it involves repeating the same words, this is a form of meditation as well.