ZipBooks - ZipBooks is online accounting software for small businesses. 100% free, forever.
ESP - C language web framework.
CountUp - Accountants for startups
The Manager's Red Book - Other Retail
Momenteo - Freelancer accounting and invoicing made simple
Katana MRP - Katana Cloud Inventory gives you a live look at all the moving parts of your business — sales, inventory, and beyond. Combining a visual interface and smart real-time master planner, Katana makes managing inventory and manufacturing intuitive.