K-9 (Android) is an open-source email client with search, push mail, multi-folder sync, flagging and refiling, signatures, bcc-self, configurable alerts and more. K9 is focused on making it easy to chew through large volumes of email
K9 is an experimental fork of the core Android POP/IMAP email client. Primarily, K9 is focused on making it easy to chew through large volumes of email
MailDroid was built by frustrated Blackberry users who, after using Android, had issues with the standard mail client, as well as with third party extensions of the client
PalmReader - Tiny tool to read data from Palm Desktop Windows software and push it to your Google Mail account (and probably use it on your Android phone).
Palmreader is able to read your Palm Desktop's address.dat file, extracts all address information and directly pushes it to Google Mail
"Picture to my email" enables you to take any picture and send it to your pre-configured email address. This application makes the sharing pictures easy and instant. All you have to do is just configure the email settings in the application and you are good to go
Postdroid - Have you ever been travelling and tried to find the perfect postcard to send home? Not only do you have to find the right card, but you have to calculate the postage and find a post office to mail it. This takes a lot of time away from activities you would rather be enjoying