You can go to your App Store purchased history in iTunes on your PC and download your previously purchased apps from there. You'll still have to tap the download button for each app separately though as, as far as I know, no way to bulk download your entire purchase history.In iTunes on my PC, it shows 205 apps in my library. However, in the app store on my ipad, I have 800+ apps in my purchase history.
Is there any quick and easy way to re-download the other 600+ apps into iTunes without having to search for them one by one?