WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
Hidden Bar - A ultra-light MacOS utility that helps hide menu bar icons.
WizTree - WizTree quickly finds the files and folders using the most space on your hard drive. It scans the MFT (Master File Table) instead of crawling the entire disk which makes it very fast.
Pliim - One click and be ready to go up on stage and present!
TreeSize - TreeSize tells you where precious disk space has gone to.
Hocus Focus - A Mac menu bar utility that hides your inactive windows