Uraleq is a free advanced multiband processor with flexible parameters and comprehensive Mid/Side processing. More free plugins can be found under the link.
Free Transient Shaper, Multiband Compressor and Parallel Compressor from W.A.Production. Download here.
Download all abandoned Darkware plugins from Jack Dark here. These 32 Bit plugins might need something like Jbridge to run but are still worth it.
Here are 3 examples:
You can grab lots of free samples from 8DIO, like hang drum, bongo, cajon, guitar, marimba and more.
Aesthetic is a free Vaporwave drum kit, packed with over a hundred kicks, snares, claps, toms and cymbals. As is typical for the genre, all sounds are based on vintage drum machines from brands, including E-MU, LinnDrum, Oberheim or Roland.