A question came up today in the ISA-95 Committee meeting about good scheduling companies. Someone asked if the group new about any good scheduling companies.
Some of these companies (and legacies) came up. This is my no means a comprehensive list of APS companies.
http://www.taylor.com/
http://www.preactor.com/
http://www.jda.com/ - formerly Manugistics
http://www.i2.com/
FactoryTalk Scheduler - formerly from System Modeling Corporation
Visiprise also bought RSS in 2006, but I could not find it on their website. Read Article.
The Cox family also started a new company in 2007 - Dynafact.
Other companies that focus on Lean scheduliing include the following, not a complete list:
FactoryLogic (now owned by SAP)
DemandPoint
Invistics
Future State Solutions
Ultriva
Plexus
CellFusion
Epicor