I downloaded it using opera mini (m.opera.com).
Unfortunately, I cannot use it, though. It gives an error message (error starting skype lite class net.rim.device.api.ui.scrollview not found). I hope you have better luck with this than I did.
Skype has not made any recent announcements about plans to release versions of the Skype app for older BlackBerry OS devices - that includes OS 6 and 7. Skype Lite, upon which we were able to use Skype, was decommissioned in January 2013: https://support.skype.com/en/category/SKYPE_LITE/
Skype is now available on the BlackBerry Z10 and Q10 running at minimum the 10.1 OS.