Impulse Tracker - Programmed by Pulse (Jeffrey Lim).

Supports SB16, GUS, SB Pro, SB and PC Speaker. Features a Scream-Tracker-3'ish interface. Edits up to 64 tracks, 99 instruments, multi-sampled instruments, volume,panning and pitch envelopes, bidirectional looping, 8/16 bit samples with variable C5Spd (higher tuning range than ST3). Uses a (slightly altered) superset of the S3M commands. IT created the New Note Actions format, now being implimented by almost every new tracker. Imports S3M, MTM, MOD and IT type mods, ST3 and IT type samples /instruments (anything else is interpreted as raw data). Mod files can be used as instrument libraries. Writes IT and S3M files (S3M with restrictions). Non-crippled non-obliging shareware.