• Ad-aware - a free multi spyware removal utility that scans your memory, registry and hard drives for known spyware and scumware components and lets you remove them safely. (freeware)

• Backup4all - Backup4all protects your data. Featuring an easy backup wizard, powerful file filters and schedulers. Set up multiple backups and schedule them any way you like. Once a backup is performed, see what files have been changed since last backup. Incremental backups. Backups on HDD, LAN, CDR, CD-RW. (Freeware)

• Download Accelerator Plus - Download your music, video, games and software files with Download Accelerator Plus (DAP), and increase your download speed by up to 300% (According to users and website reviews). (Shareware)

• Getright - a Download Manager program to help you download files from the Internet. It allows you to easily download files and recover (resume downloading) if errors occur. (shareware)

• ICQ - ICQ or 'I Seek You' is simply a clever way of getting in touch with people. ICQ lets you chat, send emails, SMS and wireless-pager messages, as well as transfer files and URLs. (freeware)

• Kazaa Lite - Kazaa Media Desktop is the number 1 peer-to-peer application which allows people around the world to share files (music, video, software). Kazaa Lite is free from spyware unlike the official Kazaa. (freeware)

• MailWasher - a powerful email checker with effective spam elimination. Discover the safe way to stop unwanted viruses and e-mails before they get to your computer. (freeware)

• Mirc - chat on IRC with Mirc. (shareware)

• mp3Trim - mp3Trim can trim the parts that you want to discard. mp3Trim can adjust the volume - either manually or automatically (normalization) - for example, to amplify those pesky MP3s that sound too low. mp3Trim can fade-in/out (to fix abrupt beginning/ending). mp3Trim can clean up your MP3s and recover wasted disk space. (freeware)

• POW! - a small and free utility that eliminates popup-windows. (freeware)

• Sygate Personal Firewall - easiest-to-use PC firewall and still free for personal/home use. (freeware)

• Winamp - play music, watch movies. (freeware)

• Winzip - unzip/zip files with ease. (shareware)

• WS_FTP LE - (file transfer protokol) the limited edition version of WS_FTP Pro, allowing only multiple file transfers and the auto re-get or resuming feature. (shareware)

Suggest a useful program
a program you use on a daily basis and can't manage without.