Every modern browser has its own download functionality, so why should you use a separate application for handling downloads in the first place? Because Leech works better than any built-in download manager.

The best download manager is the one that doesn't get in your way. That's why Leech stays quiet in the background, and works when you want it to. If you're using Safari, you can send downloads to Leech via the Leech Contextual Menu extension. In Firefox, Leech can automatically capture most downloads (via the FlashGot extension). For all other browsers—and other applications that may contain URLs—you can use drag-and-drop or copy-and-paste to have Leech manage those downloads

Limitations: Leech will work for 25 launches without limitation. After that, a registration reminder will appear upon each launch until you purchase the program.

Requirements:
OS X 10.8+
Intel