Cumbia Villera (from the villas, as low income settlements in Buenos Aires are called) is the Argentinean “ghetto” version of Cumbia, originated from Colombian Cumbia and was brought to Argentina by immigrants. In the late 90’s it got more and more played with and transformed by electronic music equipment. The vocalists started as well to sing lyrics about about sex, drugs and crime. The result is a stumbling and laid-back beat with straight bassdrum and crazy, twisted and bended keyboard lines.

There is very good information on Cumbia Villera on the internet:
Cumbia Villera on Wikipedia
Cumbia Feature in Fader Magazine written by Cumbia expert DJ/ Rupture
Droppin’ Some Knowledge, Part 3 – Musicology
“The people will be heard” in The Guardian
La cumbia villera y el fin de la cultura del trabajo en la Argentina de los 90 (in Spanish)
Um breve panorama #1 – CUMBIA (in Portuguese)

Tracklist:

01. Dany Lescano – Cumbia Cabeza
02. Repiola – Danza Repiola
03. Gran Hermano – El Beso De Osito
04. Meta Guacha – No Te Bongas Brava
05. El Gasty – De Izquierda A Derecha
06. Monoblock – Los Cumbieros
07. La Repandilla – Traka Traka
08. Los Pibes Chorros – Gatillo
09. Yerba Brava – Activando Cumbia
10. Los Pibes De La 2 – Muevelo, Muevelo
11. Suena Rototón – El Pelotero
12. La Peluca De Mirta – El Pasito Del Avión
13. El Perro – Floggers
14. El Tecla – El Baile
15. La Liga – RMXS Lalo DJ
16. La Banda De Lechuga – Mi Chiquita (Remix)
17. Damas Gratis – Se Te Ve La Tanga Feat. Reyes Vallenatos (Cristian Dee Jay Remix)
18. El Original – Pégate A Lo Mio
19. Cumbieton – El Cuchulum (Remix)
20. El Polaco – Para Que Lo Muevas (Remix)
21. El Empuje – Pito chiquitito (Marcela Baños Remix)
22. Altos Cumbieros – La Cola Less
23. El Baile Del Oso – Baila Baila
24. Eh Guacho – Apreitato
25. La Base – Alta Gira Por La Matanza
26. Sonido Básico – Sabes Quien Soy

And here are some resources for downloading Cumbia Villera:
CumbiaLate
Saltamusic
Los Del Tablón
Metacumbiero