There’s a number of not that well-known amp sims and pedals out there developed by individuals or smaller, indie, less-known companies that’s not reviewed on this site as of yet. These range from full-blown sims to proof-of-concepts and experiments. Most of these are freeware. Some are excellent but quality varies. To make it easier finding these here is a list (in random order) of some of the amp sims and pedals not mentioned anywhere else on the site.
Linda Audio has a few plugins, most interesting to the guitarist would be the Rock Amp. Freeware.
Check the Modern Deluxe and Tone Deluxe amp sims, also some keyboard-related VSTs. Freeware.
Wampler is offering VST3 versions of three of the fx from their multi-function pedal Terraform as a test. Included is an envelope follower, a univibe and a chorus. Download is free but you will have to answer a short survey.
SGA – Ace
A free model of a legendary 1950s, American, all tube, tweed, 5W amp by Shattered Glass Audio.
A science project turning a Klon Centaur schematic into an audio plugin. That’s how the ChowCentaur was born. Includes both a traditional and a neural network-based model. Freeware.
A fairly large number of amp sims and pedals to download. Freeware.
Lots of free plugins mainly modeled after analog gear . All released for free on their Patreon page. For guitar you’ll find some preamps and effects pedals including a model of a Russian Big Muff.
Guitar Gadgets was an entry to the KVR Developer Challenge 2014. The focus here was not to develop classic effects but weird, strange, ugly or “different” ones instead. Freeware.
Has a number of guitar sims but everything is still in beta. Still there are some demos to download if you want to try them out at an early stage.
If you know a plugin that you think should be on this list, please let us know in the Honest Amp Sim Reviews usergroup on Facebook.