OpenMPT - OpenMPT is a popular tracker software for Windows.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
SunVox - SunVox is a small, fast and powerful modular synthesizer with pattern based sequencer (tracker).
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
PxTone Collage - A music editing software, capable of using common sounds, custom sounds, and everything in between to make surprisingly good music. Originally in Japanese, but easily fixed.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs