Whatever made the Hackulous team shut down Installous yesterday is surely giving a push to other even easier alternatives for side-loading (and, as is often the case pirating) iOS apps.
Two of them are getting quite a lot of attention since Installous shut down - Zeusmos and Kuaiyong. In fact the Zeusmos website is currently down and huge spike in interest could be one of the explanations.
Both services don’t require jailbreak and, of course, you can’t get them from the App Store. The installation process is reportedly quite easy, needing you to just visit a website and hit an Install button, though we cannot confirm that ourselves. Then your Installous replacement will appear on your home screen.
If anything happen to those two, surely another four will pop up in their place. It seems that even Apple will be unable to stop piracy, no matter how hard it tries and how tight a grip over the iOS ecosystem it holds.