fio - Generate I/O for benchmarking, stress testing, verification or workload reproduction purposes.
CPU Frequency Selector - Cinnamon CPU Frequency Selector Applet
CrystalMark - CrystalMark is a full included benchmark application that can be utilized for surveying the execution and capacities of a PC.
Udev Discover - A helping tool for udev testers, coders, hackers and consumers.
Iometer - As the Iometer Users Guide says, Iometer is an I/O subsystem measurement and characterization tool...
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.