UT has 5 Councils:
Interfraternity Council (IFC), fraternities
National Pan-Hellenic Council (NPHC), fraternities & sororities
Texas Asian Pan-Hellenic Council (TAPC), sororities
United Greek Council (UGC), fraternities & sororities
University Panhellenic Council (UPC), sororities
and an option for Affiliate Organizations
Our Order of Omega Awards includes a Cross-Council Collaboration Award -
http://deanofstudents.utexas.edu/gle/reco_omega.php
In recent memory, Alpha Phi had Alpha Phi Alpha over for dinner last month. We also invite all the other orgs to participate in our events i.e. philanthropy, etc.
ETA: they also had the Deltas over for dinner.
I think UT-Austin has all of the D9 except for Iota Phi Theta Fraternity -
www.texasgreeks.com
Alpha Phi Alpha Fraternity -
http://www.utalphas.net
Alpha Kappa Alpha Sorority -
http://studentorgs.utexas.edu/aka/
Kappa Alpha Psi Fraternity -
http://www.utnupes.com
Omega Psi Phi Fraternity -
http://www.utques.com
Delta Sigma Theta Sorority -
http://www.utdeltas.com
Phi Beta Sigma Fraternity -
http://www.utsigmas.com
Zeta Phi Beta Sorority -
http://uts.cc.utexas.edu/~zeta
Sigma Gamma Rho Sorority -
http://www.geocitites.com/austinprettypoodles/Enter
UT Blacks Online offers information about the Black community at The University of Texas - Austin.
http://www.utblacksonline.com/index4.html