Apps similar to Gig Performer include GarageBand, which is free. Other options are Carla, STANDALONE, AudioMulch and Kushview Element. There's no shortage of Music Production Apps like Gig Performer, with more than 25 alternatives for Windows, Mac, Linux, iPhone and iPad.
Experience a rich music creation suite on Mac and iOS with comprehensive sound libraries, virtual session drummers, and user-friendly tools suitable for beginners and pros. Create, edit, and share your music effortlessly through a seamless Apple integration.
United States
Carla is an audio plugin host, with support for many audio drivers and plugin formats. It has some nice features like automation of parameters via MIDI CC (and send output back as MIDI too) and full OSC control.
STANDALONE is a lightweight AU and AUv3 plugin host for Mac designed specifically for guitarists and bassists who want to run amp sim and effects plugins without opening a DAW.
AudioMulch is an interactive musician's environment for PC and Mac. It is used for live electronic music performance, composition and sound design.
Australia
Element is a cross-platform, modular AU/VST audio plugin host. Create powerful effects racks and instruments by connecting plugins to one another. Load graphs on the fly for quick access to your sounds.
United States
Austria
EU
Cantabile is a music workstation for live performing musicians. Build your ideal rig - one that leaves you free to focus on giving your best performance.
A VST (plus AudioUnit on OSX) plugin host designed for live use. Based on the JUCE 'audio plugin host' code, heavily modified to better suit my purposes.
Plogue Bidule is a modular audio software with full VST, Audio Unit and Rewire support.
Canada
NanoHost is not a synthesizer. It is a free, minimalist host application for Windows that can load VST-synths. Furthermore, it can act as a wrapper which converts VST-synthesizers into standalone applications.
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Live, modular sound design environment that enables a user to combine, split, layer and chain their VST instruments and FX.
United Kingdom
Rack Performer is a high-level modular environment hosting VST plugins and internal modules (over 100 and counting), with MIDI support, multi-channel audio I/O and internal processing, complete automatic patch-delay compensation, sample accurate sequencing, low jitter and...
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