Digit - SMS bot that monitors your bank account & saves you money

SDelete - Securely overwrite your sensitive files and cleanse your free space of previously deleted files using this DoD-compliant secure delete program.

Quicken - Stay in control of your monthly cash flows, budgets, and expenditures. Quicken provides a navigable interface where you can organize your debit, credit, and savings, and build good habits accordingly.

CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.

Penny - Penny is a personal finance app that takes the pain out of keeping track of your finances.

Clean Master - Some users swear by it, some call it a glorified snake oil that does more harm than good. That can be said about any snake oil, but what specific brand of snake oil can boast almost a billion downloads around the world?