The EU Parliament has seven political groups and 31 non-attached members (NI=Non Inscrits ).
http://www.europarl.eu.int/groups/
Political Group Members
PPE-DE / EPP-ED 232
http://www.epp-ed.org/home/en/default.asp
PSE / PES 175
http://www.socialistgroup.org
ELDR 53
http://eld.europarl.eu.int/Content/Default.asp
GUE/NGL 49
http://www.europarl.eu.int/gue/
Verts/ALE Greens/EFA 45
http://www.greens-efa.org/
UEN 23
http://www.europarl.eu.int/uen/
EDD 18
http://www.europarl.eu.int/edd/
http://www.eddgroup.com
NI 31