Like Internet forum (message board), email (Electronic mail) has been active from the beginning of Internet until now. As a result, we all rely on email for our work and communication to some extent. Thereinto, the free, powerful and friendly Gmail has always been the leader with the most users in the world. But even so, using it on computers and mobile phones has many inconveniences. For instance: all web browsers should enable JavaScript and Cookie features; sometimes you may inadvertently shut down an email page you are editing inside; and no one likes to use Gmail in the browser on a phone all the time.

i.Scribe is a small, portable and cross-platform (Windows, Linux and Mac OS X) free desktop E-mail client that integrates with contact database and calendar. It's a classic app that was first released in 1999. In 2003, i.Scribe led to a commercial, full-strength edition InScribe, which comes with Unlimited Send/Receive Accounts, Unlimited Filtering, Multiple Identities, Outlook (MAPI) Export.

Mailbird is a small, simple and user-friendly free desktop email client for Windows, written in WPF and C#. It focuses on speed and email productivity, was mainly inspired from the classic Sparrow on Mac OS, and is totally different from common email software like Thunderbird, Outlook or Windows Live Mail.