studiotoolz♥

LittleGPTracker (a.k.a piggy tracker) is a sample based tracker originally for the GP2X and GP32 consoles, now we have a OSX build.
It implements the user interface of littlesounddj, a very famous tracker for the Gameboy platform. It currently supports 8 monophonic 8Bit/16Bit/44.1Khz stereo channels as well as 16 channel midi output.
Piggy is currently [...]

bcr steps is a step sequencer and arpeggiator made for the Behringer BCR2000 controller. It can also be used on its own, or with almost any other MIDI controller. If you like, you can try out the applet version, though it won’t give you the full MIDI capabilities of the standalone application.
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http://mars.pingdynasty.com/software.oml (892 clicks)

The PolyRythmic Sequencer is a Vsti rhythmbox with which you can play samples of your choice.
Every sample:
- is played according to a pattern.
- can be pitched according a definite sequence.
- can be played as a loop.
Loop can vary in size on the tempo and according to a definite sequence.
Every pattern can play a definite number [...]

MMS is a MultiMedia Sequencer patch written in Max/MSP. Sorry for those who do not speak french… very soon, a version of the documentation will be available in english too.
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http://www.bloghotel.org/tworowski (830 clicks)

Aria Maestosa is an open-source (GPL) midi tracker/editor. It lets you compose, edit and play midi files with a few clicks in a user-friendly interface offering keyboard, guitar, drum and controller views.
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http://ariamaestosa.sourceforge.net/ (312 clicks)

Breakage: the intelligent drum machine for intelligent breaks
Breakage is an intelligent drum machine designed to make it easy and fun to play complex, live breakbeat performances. A step-sequencer pattern editor and previewer, database, sample browser, neural network, pattern morphs, statistics and probabilistic pattern generator give you the tools to work with breaks on a higher [...]

Jackbeat is an audio sequencer running on Linux and Mac OS X, for musicians and sound artists:
* Drummachine interface with accurate VU meters for easy editing
* Realtime operation: while playing, the sequence can be edited and resized, the bpm rate modified, and new samples loaded,
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Señor Staff is an open-source music composition app for Mac OS X.
It features a staff-based interface (rather than a tracker interface) for natural entry and readability, and supports playback to any MIDI device.
Emphasis is placed on user efficiency and automated enforcement of musical constraints.
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http://www.gusprevas.com/senorstaff/ (209 clicks)

AVdrum is an audio video step sequencer and drum machine. You have the ability to switch audio or video of a movie clip On/ Off in realtime to compose AV sequences. This truly innovative software takes the concept of step sequencing to the next level.
You may trigger AV clips on AVdrum via computer keyboard or [...]

simple MIDI pattern/step sequencer
PatternSequencer features up to 16 parts, each of which can have 8 different patterns. You can set MIDI channel, volume, bank and program number for each part. Patterns can be up to 128 steps long. Timing can be 4, 8 or 16 steps per beat.
Notes are edited on a 32×16 matrix. [...]

MIDI Builder enables the creation of 1 to 4-voice MIDI files in “step-entry” fashion.
Please note that although MIDI Builder can be used by practically anyone to create simple melodies, it will be found more useful to those who are comfortable with music notation and who can keep track of musical sequences in memory.
MIDI Builder does [...]

Four FM modules, step sequencing, randomization, saving, reverb, downsampling, stuttering, hardisk recording, and midi control over the carrier frequencies.
Requires osx to run, ok on powerpc, don’t know on Intel.
This application has been commissioned to me by the German magazine KEYS and version 1 included in their 11/06 issue (thanks Nils!).
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http://www.skyapnea.com/maxmsp.htm (883 clicks)

IanniX is a graphical editor of multidimensional and multi-formal scores, a kind of poly-temporal meta-sequencer, based on the former UPIC created by Iannis Xenakis.
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http://sourceforge.net/projects/iannix/ (593 clicks)

Multitemporal note generator
ValEVarion Evolved is another offering from Unbearable Devices in the Multitemporal Audio Tools series.
ValEVarion is MIDI based and before you start complaining, think. Think that all
your software based samplers and softsynths can be controlled by MIDI. So even
if you don’t have an exquisite sounding hardware MIDI sound generator, all you existing software [...]

64step is a versatile sequencer/sampler designed for tight integration with the monome 40h. please write peter a t flatflat.org for bugs.
It also works without the monome as a simple sequencer and to shoot samples with the computer keyboard.
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http://wiki.monome.org/view/AppMaxMsp64step (1073 clicks)

Micromontage technique allows the composer to work a musical figure point by point, shaping each sound particle with microscopic precision. The software presented in this paper combines graphic and script editing with algorithmic generation and manipulation of sound sequences. It provides several tools to enhance both creation and organic development of the musical material under [...]

MRP Sequencer is a software step sequencer conceptually very similar to vintage analogue step sequencers such as the ARP 1601/1603 and Korg SQ10, and recent digitally controlled step sequencers such as the Frostwave Fatcontroller and Colin Fraser’s P3.
MRP Sequencer goes a little beyond the feature set of most step sequencers.
sequences of up to 64 steps
track [...]

The Guid Machine is a Step Sequencer combined with a sample player. The Step sequencer has 4 X 16 steps while the sample player can load 4 samples simultanuously. Nothing new so far, but what makes the GUIdMachine special are a few unique features.
First of all you can easily shift any of the sequences [...]

The Mooquencer is a sequencer engine that is part of a collection of max/msp patches written by shawn hatfield (twerk) which attempt to exploit chance, randomness, and improvisation.
http://www.audibleoddities.com/twerk/ (850 clicks)

This Beatbox is a standalone Max/MSP application. This beatbox does not come with any samples, you have to provide your own.
http://theendmusic.org/programming/beatbox (639 clicks)

Matrix Sequencer Max/MSP Standalone.
http://www.audiooo.com/jp/freestuff/index.html (2284 clicks)

Max/MSP Looper / Sequencer .
This is something I used a little while ago for a show Bryan Teoh and I played. I cleaned it up a bit and bundled a ReadMe with instructions. You’ll need the Max/MSP 4.5 runtime to run it or a full version of max to hack it up.
http://www.hecanjog.com/software.php (973 clicks)