The sxc.hu image site is no more
If you've recently tried to access the free image site sxc.hu, you may have encountered a login page requesting a user name and password. The old sxc.hu site has been replaced by the new FreeImages.com site. As far as I can tell, all of the functionality of sxc.hu (and possibly more) has been transferred over to the new site. It offers both free and premium images for download.
There are undoubtedly a number of WA blogs and trainings that still reference the sxc.hu site. Just substitute FreeImages.com for sxc.hu to use their new site.