Lens

Lens proved to be an essential part of my free toolkit. Beautiful idea and execution, if you're intricately familiar with multiband compression. You could use it without such knowledge, but its utility and innovation really shines when you understand the problems that mb-comp tries to solve - or plugin designers try to solve when sketching the product out.

Up to 64 bands with great fast control in one window, linear phase and a manageable CPU overhead? This is extremely useful for sounddesign, and I can't be grateful enough for the free version, as it makes so, so easy to recommend this to students. Yes, Pro-MB offers a very fine-tuned control, but not only it is around $200, but also it's a different beast at the end of the day.

I don't know anything like Lens, and I became a fan in the first day.

My applause to you, Auburn, you did it again.