This document contains a list of URLs about free SMS services in Indonesia and tutorials for using Gammu, an open source tool for communicating with GSM modems and mobile phones. It includes links to websites where users can send free SMS messages through an internet connection as well as instructions for installing and configuring Gammu SMS daemon on Linux to send and receive SMS messages from a connected phone.

1. http://www.freesms4us.com/
http://indosmsfree.com/index.php
http://www.sms-gratis.web.id/news.php
http://freesms2indonesia.com/
http://www.smsgratis.co.id/
http://www.sms-online.web.id/kirim
http://sozashare.blogspot.com/2013/03/sms-gratis-lewat-internet.html
http://blog.rosihanari.net/membuat-sendiri-kirim-sms-gratis-via-web-dengan-php-
dan-mysql/
http://www.ilmuprogrammer.com/2013/06/membuat-sms-gateway-untuk-pemula-
dengan.html#.UmRJpnCl4p5
http://gamajen.blogspot.com/2013/02/ice-blast-final.html
gammu --identify
gammu-smsd -c smsdrc -i
jika gagal
gammu-smsd -u
baru
gammu-smsd -c smsdrc -s
http://blog.rosihanari.net/easy-gammu-installer-free-download/
http://petrixlanang.blogspot.com/2013/03/download-kumpulan-program-vbvisual.html