80s & 90s Synthesizer filled Soul and Afro-Beat.
There is an download section on this website with a few albums but what makes this website so valuable is that it gives you an starting point on finding synth music in Africa. If you were looking to do something like, make a African based Vaporwave album, this website would be a good starting point.
afrosynth.blogspot.com/

Tons of rare grooves from Africa, Asia and the Middle East
https://lolaradio.blogspot.com/

You ever been listening to J Dilla or 9th Wonder and wondered where did they lift those samples from?  Check these albums out and find out.
http://musicasdosanos60.blogspot.com/

Chitlins, Catfish and Deep Southern Soul
http://deepsouthernsoul.blogspot.com/

Brazilian  Lounge
http://laplayamusic.blogspot.com/

Brazilian Rock/Jazz/Funk/Soul
woodstocksound.wordpress.com/

New & Classic Funk
http://newfunkclassicmaster.blogspot.com/

Lo-Fi Prog, Punk, Ambient & Garage Music
http://dieordiy2.blogspot.com/

A collection of Italian Library Music and other Obscurities.
http://weirdope.blogspot.com/

Tons of Rare Grooves and Library Music
https://thepeoplesvault.wordpress.com/

Free Acapellas Instrumentals Samples Mashups Bootlegs Mp3s & More
http://acapellatown.net/

Jazz Fusion / Prog / Psych / Funk / Brazil and so much more....
http://ezhevika.blogspot.com/

Rare 60's Psychedelic/Garage Tracks
http://musicislifeptreasurebox.blogspot.com/

60's and 70's Soul
http://www.grooveaddict.org/