http://apps.evozi.com/apk-downloader/
How To Use:
1. Go to for example https://play.google.com/store/apps/details?id=com.opera.browser.beta
2. Copy the link
3. Go to http://apps.evozi.com/apk-downloader/
4. Inster the link
5. Dwonload & Upload and Install the app on you phone
6. Have Fun