TwinHan - Chinese manufacturer which produces a cheap but very stable hardware-
               VisionPlus 1020, 1030 and other.

Technotrend - German Manufacturer of legend - SkyStar-1

Hauppauge -  Nexus-s (clone of SkyStar-1) manufacturer (Germany)

Technisat  - German Manufacturer of Sky2PC (aka SkyStar-2) cards

Pinnacle Systems - PCTV Sat manufacturer

Alitronika DVS - Interesting DVB cards with some additional functionalities.

Digital Everywhere - FireDTV cards manufacturer

On these sites you'll find news about satellites, transponders, new channels or channels which disappeared.

LyngSat,  SatcoDX,  Satmania