Движки для рабочих процессов в SharePoint

http://msdn.microsoft.com/ru-ru/library/office/jj163199(v=office.15).aspx (встроенный)
http://agilepoint.com/products/agilepoint-for-sharepoint/
http://www.nintex.com/en-US/Products/Pages/NintexWorkflow.aspx
http://www.k2.com/solutions/workflow-for-sharepoint
http://www.opentext.com/what-we-do/products/business-process-management
http://www.harepoint.com/products/harepointworkflowextensions/Default.aspx
http://www.datapolis.com/
http://store.bamboosolutions.com/sharepoint-workflow-conductor.aspx
http://www.alcero.com/EN/solutions/Pages/default.aspx
http://www.skelta.com/products/sharepoint-accelerator/
http://www.ultimus.com/adaptive-bpm-suite-software-modules/
http://www.appian.com/bpm-software/bpm-for-end-users/sharepoint.jsp
http://www.smartdraw.com/product/features/ms-sharepoint-integration/

Обзоры
http://blog.liquidmercurysolutions.com/blog/bid/328470/Who-Really-Has-the-Best-SharePoint-Workflow-Product
http://msdn.microsoft.com/en-us/library/office/ms461944(v=office.14).aspx (для версии 2010)