The ClickSend Java SDK allows developers to integrate SMS services into applications. With this kit, they can send, receive, and track SMS. Opportunities include meeting reminders, client alerts, and business notifications. In addition, ClickSend offers SMS API, online SMS, Email to SMS, Outlook SMS, Bulk SMS, and SMS keywords.
Guerilla Mail is a simple idea with one purpose: to avoid spam. The idea is dead simple: go to the website, it gives you a random e-mail address that's good for one hour, and links to nothing else. Register for sites or whatever with it, and then never worry about it again. Although the web service is convenient, sometimes it's not everything you need. For those cases, one might want to look into using the Guerilla Mail API.