Source code

Apple distributes TextEdit's source code as part of the documentation of its integrated development environment (IDE) Xcode. On the Internet, the source code to a version of TextEdit enhanced to demonstrate the calling of Quartz Composer compositions from the Cocoa API can be found at Apple's developer website. The following quote is from the characteristic part of the New BSD-compliant license text included in the source code:

In consideration of your agreement to abide by the following terms, and subject to these terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in this original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the Apple Software, with or without modifications, in source and/or binary forms; provided that if you redistribute the Apple Software in its entirety and without modifications, you must retain this notice and the following text and disclaimers in all such redistributions of the Apple Software. Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to endorse or promote products derived from the Apple Software without specific prior written permission from Apple. Except as expressly stated in this notice, no other rights or licenses, express or implied, are granted by Apple herein, including but not limited to any patent rights that may be infringed by your derivative works or by other works in which the Apple Software may be incorporated.