The shareware developers at
YazSoft have updated Speed Download to version 1.9.2. Speed Download offers multithreading so you can go online and download as many files as you want, simultaneously.
Version 1.9.2 offers a variety of performance enhancing tweaks, according to YazSoft. The update offers better window menu handling under Mac OS X 10.2.1; MIME type handling has been improved; setting a download position for each item in the queue is purportedly much smoother; and keyboard shortcuts have been optimized.
Speed Download requires Mac OS X 10.1 (or higher) or Mac OS 8.6-9.x (with Apple’s CarbonLib 1.6 or higher extensions), and an Internet connection. The cost is US$20 for a single user.