The United Way of Southwestern Indiana maintains a very valuable "Community Resource Guide" on their website. This guide lists services and programs offered by hundreds of nonprofit agencies around southwestern Indiana, from tutoring (for both adults and students) to child care provider training to support groups -- the list is extensive.
Just chose your category, and then look through the descriptions of the agencies, programs, and services that are listed. The listings tell you what each program offers, and who's eligible. Complete contact information is given.
The United Way also maintains the 2-1-1 Call Center, an information and referral service. Simply dial 2-1-1 if you need help in finding social services of any kind.
You might also be interested in their Day of Caring, coming up in September. This is a community-wide event in which United Way connects businesses and volunteers with nonprofit agencies in need of help.