With all the Windows Mobile phones we cover here, more than a few readers probably took the plunge and picked up a WinMo phone for themselves—then subsequently discovered that they need to download third party apps in order to make the phone great. Lifehacker's got a few tips on which ones you should make room for.
The better ones: Agile Messenger (an IM app), AudioPod (a podcast app), eReader (for reading eBooks), Kevtris (Tetris), and Skype (VoIP, as if we needed to tell you). Most of these are both free and good, and are almost a necessity if you want to do anything with Windows Mobile, which has a skeletal amount of bundled software.
11 Killer Freebies for Your Pocket PC [Lifehacker]