1. SCREEN SAVER UTILITY - A screen saver is a program that automatically fills the computer’s screen with moving images or patterns when the computer is not in use. Screensavers were originally designed to prevent phosphor burn-in (ghosting) on CRT monitors. Currently, screensavers are used primarily for entertainment, advertising or
security purposes.
2. FILE COMPRESSION UTILITY. A file compression utility shrinks the size of a file. A compressed file takes up less storage space than the original file. Compressed files, sometimes called zipped files, usually have a .zip extension. Attaching a compressed file to an e-mail message reduces the time needed for upload and download. When you download a compressed file, you must decompress it to restore it to its original form.
3. BACKUP utilities can make a copy of all information stored on a disk, and restore either the entire disk (e.g. in an event of disk failure) or selected files (e.g. in an event of accidental deletion).
4. DISK CHECKERS can scan the contents of a hard disk to find files or areas that are corrupted in some way, or were not correctly saved, and eliminate them for a more efficiently operating hard drive.
5. DISK CLEANERS can find files that are unnecessary to computer operation, or take up considerable amounts of space. Disk cleaner helps the user to decide what to delete when their hard disk is full.
6. DISK COMPRESSION utilities can compress the contents of a disk to small amounts of memory. They also decompress/ expand the compressed files.
7. DISK DEFRAGMENTERS can detect computer files whose contents are broken and spread across several locations on the hard disk, and move the fragments to one location to increase efficiency.
8. DISK PARTITIONS can divide an individual drive into multiple logical drives, each with its own file system which can be mounted by the operating system and treated as an individual drive.
9. ARCHIVE utilities output a stream or a single file when provided with a directory or a set of files. Archive suites, at times include compression and encryption capabilities.
10. CRYPTOGRAPHIC utilities encrypt and decrypt streams and files.
11. REGISTRY CLEANERS clean and optimize the Windows registry by removing old registry keys that are no longer in use.
12. FILE MANAGERS provide a convenient method of performing routine data management tasks, such as deleting, renaming, cataloging, moving, copying, merging, generating files and modifying data sets.
13. MEMORY TESTERS check for memory failures.
14. NETWORK utilities analyze the computer's network connectivity, configure network settings, check data transfer or log events.
15. A SPYWARE REMOVER is a utility that detects and deletes spyware and other similar programs. Spyware is a program placed on a computer without the user's knowledge that secretly collects information about user, often related to Web browsing habits.
16. INTERNET FILTERS are utilities that remove or block certain items from being displayed. Four widely used filters are anti-spam programs, Web filters, phishing filters, and popup blockers.
17. SYSTEM PROFILERS provide detailed information about the software installed and hardware attached to the computer.
18. SORTING UTILITY for organizing files in any chosen order.
19. MERGE UTILITY for Merging or combining different files in one.
20. HEX EDITORS directly modify the text or data of a file a program.
21. A SEARCH UTILITY is a program that attempts to locate a file on your computer based on criteria you specify.
22. A PERSONAL FIREWALL is a utility that detects and protects a personal computer from unauthorized intrusions.
23. An UNINSTALLER is a utility that removes a program, as well as any associated entries in the system files.
24. A DIAGNOSTIC UTILITY compiles technical information about your computer's hardware and certain system software programs and then prepares a report outlining any identified problems.
25. SYSTEM MONITORS for monitoring resources and performance in a computer system.