When you jailbreak an iOS device, you are given access to Cydia, the wild west frontier of tweaks, themes and apps you can’t get in Apple’s own App Store. Jailbreaking gives you the freedom to ...
Apple hasn't totally left old iPad owners behind. In addition to still signing the last iOS releases for those devices, you can still download software for them — assuming you know where to look.
UPDATE: I was initially a little surprised by the vociferous reaction to this post about installing Installous, an unofficial App Store for pirated apps. The instructions are a quick Google search ...