Nonprofits might not realize the importance of Social Media nor the great free tools that are easily accessible to them. I found a great article for you with just that in mind.
Lindsay Oberst of Socialbrite has put together a great Top 10 list of Apps for Twitter. She decided rather than having you test the hundreds of available apps out there, that she'd put together this list for you.
A couple of my favorites are:
JustCoz: Increasing awareness about your causes
JustCoz is a platform that allows people to donate a tweet a day to help raise awareness for causes that matter to you. They have 23,706 supporters currently.
Timely: Make your tweets count
Timely analyzes your past 200 tweets to find out the times during the day it's more likely that people are clicking on your tweets. This will allow you to schedule tweets at the most optimum time for viewing and engagement.
To see the other 8 free apps Lindsay mentions, check out the full article here.