Your PC uses a number of memory caches, where data that is likely to be needed next is kept at the ready—because it’s most efficient to read from or to write to memory. There are caches for the hard drive and for your CD-ROM drive that are different from the drives’ built-in buffers. In addition, there’s a cache that holds the names and locations of files. Cacheman aims to help to optimize these caches, make the most efficient use of them, and control how big they are. For the hard drive cache, for instance, you can choose what type of system it is (a file server or one that runs applications), and the program claims to manage the hard drive cache appropriately for the fastest access. It can also try and free up memory in a way similar to FreeRAM, minimizing the amount of memory that programs grab and unloading memory-hogging DLLs that aren't needed anymore to keep your PC running as speedily as possible. The program is fully functional, but the developer asks for a $10 registration fee if you like it or are a commercial user.