31. Psycle is an open source program , and is released under the GNU General Public License ( GPL ). 32. Microsoft began selectively sharing its source code a few years ago, in what it calls a shared-source program . 33. But Gates dismissed the challenge coming from open-source programs , including those written for operating systems such as Linux. 34. In general, most internet infrastructure is open source, and much more robust than the corresponding closed source programs . 35. In December 2013 the proprietary BenMAP 4 was rewritten as an open-source program and issued as BenMAP-Community Edition. 36. This led to the creation of several free alternatives, including dotPeek, CodeReflect and the open source program ILSpy. 37. Just last week, engineers at Nullsoft, Inc ., introduced Gnutella, an open-source program that is similar to Napster. 38. Since this particular article is about an open source program it might have some tiny amount of merit. 39. Some proprietary file sharing clients have been known to bundle malware, though open source programs typically have not. 40. The shared-source program is a framework for us to engage in the community as we have not before.