CPU-Z - CPU-Z is a freeware that gathers information on some of the main devices of your system : Processor name and number, codename, process, package, cache levels.
fio - Generate I/O for benchmarking, stress testing, verification or workload reproduction purposes.
Udev Discover - A helping tool for udev testers, coders, hackers and consumers.
CrystalMark - CrystalMark is a full included benchmark application that can be utilized for surveying the execution and capacities of a PC.
Speccy - Speccy - find the details of your computer's specs. Great for spotting issues or finding compatible upgrades. Download the latest version free.
Iometer - As the Iometer Users Guide says, Iometer is an I/O subsystem measurement and characterization tool...