Immunet Corporation - (Freeware)
While co-existing with other existing antivirus products, Immunet Protect Free complete the protection of the computer offering many interesting features.
Immunet Protect Free is an antivirus software based on "CloudComputing" experience of a community of users. This means that if the software installed on a computer encounters a threat, all of Immunet Protect users are protected against it.
Alongwith this benefit, "Cloud Computing" has another  advantage: it increase the speed of the computer while delivers real-time protection against viruses, spyware, bots, worms, trojans, and keyloggers without slowing down the computer.
An interesting feature of this software is the compatibility with the existing antivirus products from the same computer for a better protection.
* Cloud engines now perform much more thorough scanning of PDF, SWF, and MS Office documents. These types of files are used extensively to spread macro virus` and trojan horse type malware, and we've come up with a much better way to scan them than was possible in previous versions.
* Compatibility updates. We've made a few changes to help us improve compatibility when running applications that deal with large files, such as bit torrent clients, VMware images, photoshop/photo-editing software, etc.
* Bug fixes & enhancements to our installer as we begin laying the ground work to upgrade 1.0 users into directly to 3.0.5.
* Performance updates!