on Wednesday announced the release of Speed Download 3, their download manager for Mac OS X. The new version of the software has been rewritten for maximum performance, according to the developer. The software was recoded using Apple’s Xcode 1.5 development environment, and uses a new network architecture that the developer promises can boost performance up to 50 percent over its predecessor. The new release also features a redesigned user interface and plug-in architecture, improves compatibility, offers support for files greater than 4GB, works with Audible.com and more. Speed Download costs US$20 to register. Upgrades from v2.x are free.