KR-Reverb FS is a free reverb processor designed for ease of use, by adjusting internally the equalization and damping controls to optimal levels for producing a warm reverb sound.
Update R1.2.0:

Added an output Gain control with range
-12db to +12db
Bug fixes for better compatibility with various hosts
New look sliders and button

Features:

Output Gain control with range
-12db to +12db [...]

KResearch has released the KR-Reverb FS version 1.1.0, a free reverb processor.
Features:

Adjustable Early Reflections Size
Adjustable Late reflections size
Adjustable Diffusion control
Adjustable Decay control
Adjustable Listener position control
Dry/Wet Mix adjustment.
Host Sampling Frequency up to 96KHz
For Microsoft Windows OS (VST)
Suitable for all Pentium CPUs
Mac OS X (AU UB,VST MAC)
Support for User definable presets
(Save & Load) via Host interface

It’s available for [...]