Esmska is described as 'Program for sending SMS over the Internet. It uses publicly available web gateways and sends messages through them. This way it can be much more comfortable than using a web browser or a mobile phone' and is an app in the Social & Communications category. There are nine alternatives to Esmska for a variety of platforms, including Online / Web-based, Android, iPhone, iPad and Windows. The best alternative is textPlus, which is free. Other great apps like Esmska are Talkatone (Freemium), XendApp (Free), TextMagic (Paid) and KAPSYSTEM (Paid).
Talkatone gives you free calls, text messages, real-time location sharing and picture sharing to Facebook and Google friends, or any phone number in US. Talkatone can replace your native phone to call and text for free without using cell minutes.
XendApp provides a messaging gateway for reaching public or internal users through applications for a variety of devices. Messages can be sent directly from http://xendapp.com web site or through any of the existing web services that the web site have.
Textable is an app that allows businesses to text their customers via SMS. They provide you with a dedicated number you can share with your customers, the ability to send out mass messages, and automated messages for your frequently asked questions.