A free program for Mac, by Javad Motallebi.

Neat Download Manager for Mac is an application for downloading files from the internet in an easy and organised way. It is very intuitive and easy to use, and it is one of the best and most popular download managers for the Mac.

The application was developed to support all kinds of files, including videos, images, audio, and others. It is a very powerful and versatile tool, and it has a lot of options that allow you to configure it in order to download faster and more easily.

Free Download Manager for macOS with browser integration

Neat Download Manager is a free download manager and accelerator for macOS that downloads files using a dynamic segmentation algorithm.
It supports HTTP, HTTPS and FTP protocols, HTTP proxy and SOCKS protocol, HTTP and proxy authentication, pause/resume capabilities and automatic renewing of expired downloads.
It has browser extensions for catching download links and for downloading video/audio from many websites.