Idm 6xx Patcher V21 Top

This is the closest open-source rival to IDM. It converts your browser downloads to XDM and even supports video grabbing from streaming sites. It has a learning curve but is free.

Designed to work with multiple IDM 6.xx versions. idm 6xx patcher v21 top

I tested this on a fresh Windows 11 installation running IDM 6.41 Build 15. This is the closest open-source rival to IDM