Typical anti-virus utilities use significant system resources in order to scan files and maintain a copy of the ever-growing signature database necessary to keep up with the latest threats, but Panda's Cloud Anti-Virus uses a new Net-based approach to PC protection.
Panda's approach doesn't obviate the need to install software, but the beta client minimizes its use of local PC memory and disk space by offloading much of the processing overhead to an online server that collects and analyzes information from other nodes running the software. Panda's software for Vista/XP (32-bit only) takes a long while to run a complete system scan, but it doesn't bring your system to its knees whiles doing so.
Want to save a copy of a streaming Internet video for posterity? Enter its URL at Zamzar and the site will retrieve it, save it in one of more than a dozen video formats, and e-mail you a link to the downloadable file. The site also does conversion between various document, image, and music formats, and it can convert a text files to MP3 audio
If you can't get to a Web site and aren't quite sure why, type the address into downforeveryoneorjustme.com--it will tell you site is truly offline, or if the problem is on your end. Bonus: At dingitsup.com, you can arrange to receive alerts via e-mail, text, or Twitter whenever a favorite site goes up or down.
If you don't like having to keep track of lots of usernames and passwords to access different Web sites (and who does?), OpenID might be able to ease some of the pain. The free and decentralized service provides you with a single sign-on ID you can use to log in at multiple sites. OpenID doesn't yet enjoy widespread site support, but its gaining in popularity and works with sites like AOL, Wordpress, and Yahoo, as well as countless smaller sites.
For situations where you still need to maintain separate accounts for different sites, Namechk.com can help you keep the number of IDs you use to a minimum. It will check over 100 sites to see whether your preferred username is still available.