Not as in “freeware,” but yes, you can obtain it for $0 legally if you find a transferred license.
For the "mastering" side of EZmix, look at by Lostin70s (now often rehosted as "Crammit"). It is a one-knob compressor/saturator that instantly glues a mix. It is the closest spiritual successor to the "Rock Master" preset in EZmix 1. ezmix 1 vst free
Assuming a small development team or a single developer, the project timeline could be: Not as in “freeware,” but yes, you can
EZmix 1 VST: Everything You Need to Know and How to Find Free Alternatives Not as in “freeware
of EZmix 1 or its successors. However, you can explore the software through the following official channels: Free Demo/Trial : Toontrack typically offers a free trial