High Quality Content by WIKIPEDIA articles! Open source software is widely used for private and non-commercial applications. In addition, many independent software vendors (ISVs) and value-added resellers (VARs) use open source frameworks, modules, and libraries inside their proprietary, for-profit products and services. From the customer's perspective, the ability to use open source technology under standard commercial terms and support is valuable. Customers are willing to pay for the legal protection (e.g., indemnification from intellectual property infringement) and "high-touch" support that is typical of commercial software with the innovation and independence that comes with open source.