Freeware - Overloud Blackstar Studio IR Collection

https://overloud.com/products/blackstar-studio

The Blackstar Recording Studio is a studio equipped with lots of Vintage gear and located in Milan. The main recording room as well as all the studio rooms have been carefully sampled by Valerio Mina with several microphone setups, in order to capture all the nuances and sound perspectives, for a total of 40 IRs. The IRs are designed for the REmatrix multilayer convolver, whose Player version can be downloaded for free.

Freeware - Sixth Sample Cramit VST Plugin

https://sixthsample.com/cramit/

Cramit is a free multi-band downwards/upwards compressor and expander combined with two-stage distortion. With the legendary OTT effect being its default setting, Cramit is a fantastically quick tool to cram some energy and colour into your music.

Freeware - Tracktion Waveform Free 12 DAW

https://www.tracktion.com/products/waveform-free

A fully featured, completely unlimited free DAW for all music creators.

Freeware - Skybox Audio Drop Designer VST Plugin

https://www.skyboxaudio.com/pages/dropdesigner

Plugin for creating drops using filters.

Freeware - jerryuhoo Fire Multiband Distortion VST Plugin

https://github.com/jerryuhoo/Fire

Freeware multiband distortion plugin.

Freeware - DISTRHO Cardinal Virtual Modular Synthersizer VSTi Plugin

https://github.com/DISTRHO/Cardinal

Cardinal is a free and open-source virtual modular synthesizer plugin, available as JACK standalone and AU, LV2, VST2 and VST3 audio plugin for FreeBSD, Linux, macOS and Windows. It is based on the popular VCV Rack but with a focus on being a fully self-contained plugin version.

Freeware - Noise Engineering Freequel Bundle VST Plugins

https://noiseengineering.us/products/the-freequel-bundle-sinc-vereor-virt-vereor-ruina

Noise Engineering's Freequel Bundle is here. Two powerful synths and a mind-blowing distortion, FREE!

Freeware - OneClickChords Nano Dynamics VST Plugin

https://www.kvraudio.com/product/nano-dynamics-by-oneclickchords

Nano Dynamics is a powerful stylized multiband Compressor, allowing you to add color to your sound like never before. Nano Dynamics splits your sound into 3 different bands, auto detecting attack and release times before sending your audio into our Maximizer algorithm. Using simple design and a highly visual UI, this tool is very beginner friendly, but also provides experts a real game changer. Download today - for free!

Freeware - Magenta DDSP-VST Neural Synthesis Plugin

https://magenta.tensorflow.org/ddsp-vst

DDSP morphs audio into a range of different instruments. Unlike MIDI notes, DDSP preserves the nuances of pitch and dynamics for expressive neural synthesis.

Freeware - Stochas MIDI Step Sequencer VST Plugin

https://stochas.org/

Stochas is at it’s core a step sequencer, which means it generates MIDI notes. As such it does not generate any sound of it’s own but can be used to sequence other plugins and/or hardware synthesizers. Stochas is a previously commercial software that is now open source. It is now under the umbrella of the Surge Synth Team, a team of open-source enthusiasts who maintain and support Surge Synthesizer and other open-source tools.