<p>'Kik me!" is not a silly note to pin to someone's back. It's a request to use the Kik app to chat with someone through mobile instant messaging. Kik is just one of many messaging apps that have arrived recently to rival the humble SMS as a way of rapid text communication from phones. If you haven't tried any, you may be missing out.</p><p>WhatsApp</p><p>Free on iOS, Android, Windows Phone,and BlackBerry</p><p>Of all the SMS alternative apps, WhatsApp, recently acquired by Facebook for $16 billion, is perhaps best known. It is free for the first year and then costs $1 a year after that, in addition to any mobile data fees from the cellphone provider. It allows users to share chat messages that are longer than the odd 160-character limit of SMS messages; photos, videos, links, and so on can be included inside chats.</p><p><a href="http://www.bostonglobe.com/business/2014/03/30/messaging-services-bypass-sms-route/ObHYHUBudYvoCyWPbT1LhM/story.html">Keep reading...</a></p>