New Sonic Arts Freestyle Alternatives

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.

Giada is a free, minimal, hardcore audio tool for DJs, live performers and electronic musicians. Just pick up your channel, fill it with samples or MIDI events and start the show by using this tiny piece of software as a loop machine, drum machine, sequencer, live sampler or yet...

Native Instruments Reaktor is a virtual, modular synthesis platform. REAKTOR also provides a platform for modular synthesis in the form of Blocks – a range of sound generating and sound shaping modules.

AudioMulch is an interactive musician's environment for PC and Mac. It is used for live electronic music performance, composition and sound design.

VSTStuff is an ideal solution to play and record audio files, load VST audio effect plugins and connect these to the VSTStuff audio player.

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.

Hostprogram for VST-Plugins with ASIO-Support.

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.

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.

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...