Martin Tripp wrote a computer program to access proprietary information, sending material to three unidentified entities and attempting to cover his electronic tracks, the company said in the complaint. The owner of proprietary software exercises certain exclusive rights over the software. The owner can restrict use, inspection of source code, modification of source code, and redistribution. The owner can restrict use, inspection of source code, modification of source code, and redistribution. Proprietary software, also called nonfree software, means software that doesn't respect users' freedom and community. A proprietary program puts its developer or owner in a position of power over its users. This power is in itself an injustice. The point of this page is that the initial injustice of Proprietary software is primarily commercial software that can be bought, leased or licensed from its vendor/developer. In general, proprietary software doesn't provide end users or subscribers with access to its source code. A prime motivation behind development of products using proprietary technology is straightforward - buyers are compelled to use other products marketed by the same company. IANAL/IANYL. That said, the FSF, who are generally thought of as arguing for a fairly wide interpretation of what the GPL covers, are reasonably clear that the proprietary program and the GPL wrapper program in your example are not derivative works of each other, and their appearance together is mere aggregation: A computer program that is owned by someone, and whose use may thus be restricted in some manner or entail payment of a fee. Also known as owned program. Proprietary definition, belonging to a proprietor. See more. The GNU General Public License (GNU GPL or GPL) is a widely used free software license, which guarantees end users the freedom to run, study, share and modify the software. The license was originally written by Richard Stallman of the Free Software Foundation (FSF) for the GNU Project, and grants the recipients of a computer program the rights of the Free Software Definition. The GPL is a. Thanks to Mark Spahr for the link to a great list of the Top 50 Proprietary Programs and Their Open Source Alternatives. The list was originally published by Jimmy Atkinson on Web Hosting Database.