Our clients use HANA Database, which is in-memory computing and makes business transactions faster.

The organization was using an Oracle database and application server, and the Orarun package made deploying those products so easy. It even allowed us to move most of the Oracle software configuration effort away from us to DBAs and application support personnel. 

I do not know if YaST or Orarun made the most impact in our organization. Both made life a lot easier. YaST just made administration a breeze.

Linux is easy to use. You have more control on a Unix system.

We use it as a webserver: DNS Server and LDAP server.