InfoWorld's top picks in open source business applications, enterprise integration, and middleware The best open source applicationsApplications — ERP, CRM, HRM, CMS, BPM — are not only fertile ground for three-letter acronyms, they’re the engines behind every modern business. Our top picks in the category include back- and front-office solutions, marketing automation, lightweight middleware, heavyweight middleware, and other tools for moving data around, mixing it together, and magically transforming it into smarter business decisions. Open SourceSoftware Development