There are a lot of programs that can run on Raspbian.
Here is a list, including some popular ones:
- Google Chrome - https://www.raspberrypi.org/documentation/usage/google-chrome/. A web browser with both standard and experimental features for the RPi2 or RPi3 computer boards used in many Raspberry Pi models from 2012 onwards as well as the earlier version 1 model B+.
- Mutt - https://www.raspberrypi.org/documentation/usage/mutt/. The most widely used mail client on Unix systems is now available for use under Linux too! Send email to one or more recipients, attach files (including documents), compose new messages, edit your message headers... everything you need at your fingertips! Its fast and easy to set up so get started today!.