Retronyms has Tabletop (iTunes Link) for the iPad in the iTunes App Store for 99-cents for a limited time.

An Expandable Studio
The heart of Tabletop is a modular environment where you can mix and match different devices. Select from more than a dozen devices including samplers, mixers, effects, sequencers and more. Buy only the gear you need from an expanding catalog.

Tabletop is the first musical environment designed from the ground up exclusively for the iPad. Each device has its own uses, characteristics, personality—ranging from classics like drum pad samplers to touchscreen effects.

Virtual, Modular Gear
Plug the output of a keyboard into a delay to add an echo, or wire it up to a mixer and adjust the pan. Chain up multiple effects to create new and evolving sounds. Tabletop is an audio playground where you can create beats, compose songs, mix live, make mashups with samples from your iPod library… the possibilities are wide open.

Moog Music Inc. has Animoog (iTunes Link) for the iPad in the iTunes App Store for 99-cents (regularly $29.99) for limited time.

Animoog, powered by Moog’s new Anisotropic Synth Engine (ASE), is the first professional polyphonic synthesizer designed exclusively for the iPad. ASE allows you to move dynamically through an X/Y space of unique timbres to create a constantly evolving and expressive soundscape.

Animoog captures the vast sonic vocabulary of Moog synthesizers and applies it to the modern touch surface paradigm, enabling you to quickly sculpt incredibly fluid and dynamic sounds that live, breathe, and evolve as you play them.

Visually captivating and sonically immersive, Animoog brings iPad based music production to the next level. Whether you are new to synthesis or a professional, Animoog’s unique user interface gives you the power to easily create a visually vibrant and sonically rich universe. It is the ultimate tool for total creative expression!

Animoog’s diverse library of timbres is derived from analog waveforms captured from classic Moog oscillators, both vintage and modern, and run through a boutique’s worth of high-end outboard and analog signal processors. These include modular synth panels, Moogerfooger pedals and more.

Animoog is the newest innovation in creative tools from Moog Music, the legendary electronic musical instrument company founded by Bob Moog in Asheville, NC.