SOFTWARE - AGGREGATORS - CLIENTS

Cross-Platform

ipodder - The cross-platform podcast receiver program

Mac OS X

Xcast - Great new Aggregator for Audio and Video. Highly Recommed

PlayPod - "Easy to use RSS podcast client"

PoddumFeeder - $4.95 cost

Windows

Doppler

NIMIQ

podfeeder - Currently Windows only, OSX and Linux in the works

Primetime Podcast Receiver - Free w/ embedded media player