John M. Perez has some great free and alternative resources in this post....
"According to Gartner, approximately 85% of companies surveyed are already using Open Source Applications in 2008. The other 15% surveyed have plans to incorporate Open Source Strategies within their Enterprise in 2009. Whether your a small business, or you are looking to minimize costs - attached are some of the most cost effective applications on the market that can easily replace some of your more expensive Enterprise solutions and functions."
ROI or return on investment is different for every person, business, and situation. First you must look at your goals….what do you hope to obtain with your investment? Next, what are you investing, money, time, and/or resources? What is the timefram…