CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Blancco Drive Eraser - Hard Drive Erasure Software
TreeSize - TreeSize tells you where precious disk space has gone to.
Wiperapp - Software build to meet all needs of companies dealing with erasing data on daily basis.
CleanMyPC - A smart cleaning tool for a better-running computer.
HDShredder - HDShredder by Miray Software deletes entire hard disks, partitions or other storage media securely and according to international standards if desired. Safely recycle your hard drive!