System Environment/Daemons
CacheFiles userspace management daemon
The cachefilesd daemon manages the caching files and directory that are that are used by network filesystems such a AFS and NFS to do persistent caching to the local disk.
Development/System
Frysk execution analysis tool
Frysk is an execution-analysis technology implemented using native Java and C++. It is aimed at providing developers and sysadmins with the ability to both examine and analyze running multi-host, multi-process, multi-threaded systems. Frysk allows the monitoring of running processes and threads, of locking primitives and will also expose deadlocks, gather data and debug any given process in the system.
System Environment/Kernel
gfs2 kernel module
GFS2 - The GFS2 filesystem provided for RHEL5.
Development/Debuggers
Gathers system hardware and configuration information.
Sysreport is a utility that gathers information about a system's hardware and configuration. The information can then be used for diagnostic purposes and debugging. Sysreport is commonly used to help support technicians and developers by providing a "snapshot" of a system's current layout.