There are many great organizations around the area, if you are looking to get involved please consider one of the many great organizations below:
Element Church http://www.ElementChurch.com
God Cares Ministry 501c3 is dedicated to helping Veterans in need. http://god-cares-ministry.org
St Louis Winter Outreach http://www.stlwinteroutreach.org
Rooftop Church Homeless Outreach http://www.rooftop.org/homeless-outreach/
Mind the Gap MindtheGap Info Meets on Thursday Evenings
Campaign 4 Christ http://campaign4christ.org
Tree Toons home of St Louis Merferd http://treetoons.com/
Love Serving God 501c3 (Wentzville, MO ) http://www.loveservinggod.org