@be I 100% recommend https://github.com/DISTRHO/MVerb/
Note this is GPLv3+, not GPLv2+
@be there are many other reverbs you can use. roomy from artyfx is another very good one, see https://github.com/openAVproductions/openAV-ArtyFX
it is based on zita-reverb, but with less controls so as it make it more noob friendly