Android and different notification sounds and E-mail Notifier

How to set individual notification sounds for different types of messages (SMS, calendar, email) on Android smartphone. Yes, HTC has support and it's possible to have different sounds for incoming SMS and Email.

Navigate to Notification Sound settings (Personalize menu on HTC can be opened directly - just click on palette icon in the lower right corner):
Menu -> Settings -> Personalize -> Notification Sound

After "Notification Sound" is opened, you can set different sounds for:
Default notification
Message
Calendar
Email

Unfortunately, default HTC mail client supports only one sound for all email accounts. I'm not happy but I can live with that. On the other hand, K-9 email client (which has many excellent features and is free) supports different notification sounds for each email account. At least it always exists alternative option in Android World.


E-mail Notifier for incoming email notification - currently for Gmail and K-9 Mail accounts (only popup for K9).

IMPORTANT:

You need Gmail 2.3.4 or older. Latest Gmail (2.3.5) update will not work! Unfortunately, the new Gmail update enforces signature-type permission which can't be accessed by any 3rd party notification app.


Features:
* On-screen preview of new email
* Shows number of unread email conversations
* Multiple email accounts (Gmail / K-9 Mail)
* E-mail Privacy
* Sound, vibration and LED
* Reminders
* Quiet hours feature

Recent changes:
From v1.3.4:
Improved Gmail and K-9 Mail detection code and other fixes.

!!! You need Gmail 2.3.4 or older for Gmail notification. Latest Gmail (2.3.5) update will not work! Unfortunately, the new Gmail update enforces signature-type permission. We're hoping Google will let us allow access Gmail's API in some of the Gmail's upcoming updates.

From v1.3:
*NEW* K-9 support - extends K-9's notification functionality with interactive or non-interactive per account customizable on-screen popups