T24 by Temenos
BFUB/Fusion Banking by MISYS
Finacle by Infosys
Flexcube by Oracle
Tietonator
Postilion
Tranzware by CompassPlus
Sparrow Switch by Barclays

in Live Deployement in Large Scale Environments
Weblogic Server by Oracle
Apache Tomcat
Websphere Application Server
Microsoft Azure