I have an old ipad I would like to do some local development on.
Its running iOS 5.1.1
Are there any old tools available anywhere?
developer tools for ios 5.1.1
From what searching I have done it looks like you have to develop on mac and build/test on simulator or attached device ensuring you have configured the build for a target of iOS 5.
So the question changes to what version of xcode and SDK do I need to develop and build on mac and test/run on iOS 5?
See the Xcode wiki for Xcode details etc.
See this link for Xcode downloads old/new (may require paid developer account): https://developer.apple.com/download/more/
Also note theXcode forum link.