Disk Inventory X lets you find out what’s occupying the memory space on your Mac.
Spek lets you analyze audio files by showing their spectrogram on your screen.
FileWatcher reports all the changes to your files from the OS event monitor on your Mac.
DirEqual lets you compare files and folders side by side on your Mac.
DocFetcher lets you search inside the contents of files on your computer.
Want to compare two files to find out the differences in them? Meld helps you do that and offers you the option to merge the files.
Want to make a number of changes to your Mac? OnyX will help you do many of the utility tasks on your machine.
SpaceSniffer tool helps you to learn how the files and folders are structured on your PC.