IncrediMail 

Are you tired of sending plain, boring e-mail messages? Do you want to add colorful backgrouds, sounds and animations to your professional or personal e-mails? Then, maybe you'll want to try IncrediMail. IncrediMail is an e-mail client program for replacing your regular e-mail program, such as Outlook or Outlook Express, but it also works with Web-based e-mail accounts such as Hotmail and Yahoo Mail. It adds many fun and colorful features for enriching your e-mails and making your e-mail experience more enjoyable. You can add built-in animated emoticons, as well as cool stationery to your messages. This way, you can customize your e-mail messages depending on the adressee and the type of the message. For example, you can add a Flowers background and Kisses emoticons to an e-mail for your loved one, and a Dynamic Chart to a business e-mail. Also, the program has a built-in voice recorder for adding voice messages to your mails.

You can upgrade your version of IncrediMail to Premium, which gives you access to additional features such as more backgrounds, animations and emoticons. The developer claims that IncrediMail is absolutely free of spyware, adware and other malware. Also, it is Microsoft-certified, so these are additional reasons for trying it.