Various
de la Mancha plugins now freeware: (imo compressors have quite nice character and comes with useful external sidechain)
GTO is a vintage style 'character' peak compressor, designed for raw power and lightning response:
GTX is similar to GTO but customised with a smoother RMS delivery and further refinement in the shape of a knee control:
QB3 is a vintage-style 3-band EQ with its own unique colouring:
ClipStar is a soft clipper effect plugin, designed to prevent peaks in a subtler way than hard clipping, increase loudness and add pleasing saturation: