The search for is a quest for speed without cost. In theory, the software is excellent. In practice, finding a legitimate, safe, up-to-date "free" version of DualDL is like finding a needle in a haystack.
If a traditional university is out of reach, look for the "DualDL" approach in online learning. Platforms like edX offer "MicroMasters" programs that can be stacked. While the certificate costs money, the course material is often free to audit, allowing you to self-learn the curriculum at zero cost. dualdl free
Direct downloads typically reach your full internet speed, whereas torrents depend on the number of "seeders". The search for is a quest for speed without cost