SIR1 is a free convolution reverb.
The convolution reverb, that comes with reaper – or in the seperate plugin pack.
ReverberateLE is the free version of the Reverberate 2 and Reverberate Core.
Listing free reverb IRs – this list will be extended from time to time.
Quality might vary.
Hybrid (convolution/algorithmic) reverb that takes a different approach.
The Mo’ Verb chose a slightly different approach than most other reverbs I’ve seen. Using an actual EQ is quite common in convolution, in algorithmic there is usually something called dampening.
Glimmerverb, another free reverb by WOKwave.
The liscverb is a big and versatile reverb unit.