JackSMS became Freesmee: it is an application that allows you to send free SMS from your pc and your mobile exploiting internet. Easy to use and absolutely free.
Freesmee uses other sms messaging services on the web and its integrated messenger to save money yourself by sending SMS to everybody, for free or on the cheap.
Freesmee is available:
online as Freesmee Web,
on Windows, Linux and Mac (still in beta) as JackSMS Desktop,
on mobile phones as JackSMS Mobile
and on iOS (iPhone, iPod Touch and iPad) as iJackSMS (WebApp). More Info »
JackSMS Mobile is available for Java mobile phone, Symbian, Android and Windows Mobile: it can be downloaded from the pc and moved on phone by cable or bluetooth, or you can download it from your phone directly from http://get.jacksms.it
iJackSMS isn't a native app but a WebApp: you can access from your iPhone at http://wap.jacksms.it