For many — myself included — CCleaner has been the go-to tool for freeing up drive space for years. And while it does the job well, it never hurts to be on the lookout for better programs. Take Wise Disk Cleaner — it not only does much of what CCleaner can do, but goes the extra mile in a lot of ways.
Along with purging your PC of crap, be they leftovers from patches, program installs or driver updates, Wise Disk Cleaner offers features CCleaner does not: an "Advanced Cleaner" that searches all your drives for temporary files, regardless of location; and a "Slimming System" tool that removes bloat from the operating system itself.
There's also a built-in disk defragmenter, which appears to do the same job as the default Windows one, except it's "faster" and shows the process in real-time.
I'll be going with Wise for now, but I understand the appeal of CCleaner — it makes it hard to delete something important. A few of Wise's options, while mostly safe, do have the potential to mess with your Windows install. Best advice: if you're not sure what something does, leave it be.
Wise Disk Cleaner [WiseCleaner]