HTC HD2 is with me for since December 2009. I mentioned about Top 10 HTC HD2 Tweaks and Hacks previously. And now it’s time to list down my top 20 Windows Mobile applications for HTC HD2. Is Windows Mobile 6.5 still a good operation system when Window Phone 7 is just around the corner? Let’s find out with these applications. No matter you are using US T-Mobile, Europe or Asia HTC HD2 version…