You can use it for managing user emails and events too. It has the ability to sort/filter by multiple parameters, optionally display surname as the first name.
Contains no ads or unnecessary permissions. It is fully opensource, provides customizable colors.
This app is just one piece of a bigger series of apps. You can find the rest of them at simplemobiletools.com
Make phone numbers, emails and addresses clickable on the view screen
Many smaller improvements and bugfixes
Simple Mobile Tools