Giada - Giada is a free, minimal, hardcore audio tool for DJs, live performers and electronic musicians.
Cantabile - Plugin host for live performance.
Loopy Pro - Loopy, the sophisticated, tactile live looper app that reinvents iPhone and iPad music making.
Gig Performer - Gig Performer is a cross-platform audio plugin host for live music performances
Group the Loop - Live Looping with usefull GUI, Verse/Chorus layer system, drummer, effects, etc...
Blue Cat's PatchWork - Blue Cat's PatchWork is a universal plug-ins patchbay and multi FX that can host up to 64 VST, VST3, Audio Unit or built-in plug-ins into any Digital Audio Workstation (DAW) in a single instance, with both serial and parallel routing options.