iBench is described as 'is constituted by a bunch of 21 tests (12 of integer workload and 9 of floating point) of real usage that allows you to check and compare the CPU and memory subsystem performance of your Macintosh'. There are eight alternatives to iBench for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is CrystalDiskMark, which is both free and Open Source. Other great apps like iBench are AIDA64 (Paid), Cinebench (Free), Geekbench (Paid) and Novabench (Free).
AIDA64 is a system information, diagnostics, and auditing application developed by FinalWire Ltd., that runs on Windows, Android, iOS, Windows Phone and Tizen operating systems. It displays detailed information on the components of a computer.
CINEBENCH is a real-world test suite that evaluates your computer's performance capabilities. It's the perfect tool to compare CPU and graphics performance across various systems and platforms (Windows and Mac OS X). And best of all: It's completely free.
Linpack is a benchmark and the most aggressive stress testing software available today. Best used to test stability of overclocked PCs. Linpack tends to crash unstable PCs in a shorter period of time compared to other stress testing applications.
Xbench was developed by Spiny Software to provide a comprehensive benchmarking solution for Mac OS X. Xbench is useful not only for comparing the relative speeds of two different Macintoshes, but also for optimizing performance on a single machine.