Here are a few examples I can offer:
- Pentaho BI server
- ETL processing servers
- Data warehouse database servers
- Vertica cluster nodes
- Hadoop NameNode
What Ksplice does is pretty cool. They take your currently installed Linux kernel and apply a series of in-memory binary patches to it without requiring a reboot to keep you up to date with the latest security patches. You can be patched and secure within hours of a critical update.