as a new member in this forum,i want to recommend an app to you. i hope my recommendation can give you something useful;)
PandaZune for Windows PC is an application suite. PandaZune can let Windows phone users search the Pandaapp Marketplace application, download the xap packages and deploy any application to a WP7 device. Like other apps in Pandaapp, PandaZune is totally free for unlocked windows phone 7 users, here are some clarified key features in PandaZune:
PandaZune version1.1(beta) Key features：
1.Deploy local xap files into Windows Phone 7 device without Zune;
2.PandaApp Widnows Phone Marketplace embedded;
3.Fast download and deploy xap files all in PandaZune;
4.Manage the xap files downloaded by PandaZune;
6.The latest Windows Phone news keep you informed.