Please visit http://app.playsms.org for online working demo.
In the demo website you can register yourself and you will be given IDR 5000 credits per week (with rate IDR 100 for all Indonesia mobile destinations and IDR 500 for other countries).
You may use the website for any purpose but to SPAM or spread any negative activities. Also please note that there is no Service Level Agreement and I cannot provide any form of warranty such as privacy protection or SMS deliveries.
You may support this project by making a donation to keep this website and demo running properly.