For more than 10 years, I've covered financial management software applications for business use, on the proprietary side and in the open source arena. The availability of robust open source financial applications for businesses is now at a point where many firms are saving a lot of money by turning to free solutions. In particular, open source ERP (enterprise resource planning) applications, which feature strong financial modules, have taken a bite out of the software cost structure for many firms. In this post, I'll round up eight open source finance solutions that can save your business money.