Useful tool for people with hardware synths - Midiquest for iPad
Had my eye on this for years the mac and windows version, it's now landed on the iPad, my excitement is overflowing. Looks extremely versatile for people with hardware synths, especially ones that are fiddly to program, like the 80's and 90's digital synths with tiny screens. I've not hooked it up to anything yet, but it lets you download a synth from its long list of supported hardware, there are iap's which I've not seen how much they cost, but if it's like it's desktop counterparts, you can edit your synths with a gui that looks like modern plugins, also manages sysex data, patches and banks and has a randomise feature too boot, more info here.
MidiQuesti by Sound Quest