RegexKit

RegexKit is an Objective-C framework for regular expressions:

• Support for Mac OS X Cocoa and GNUstep. Mac OS X 10.4 or later required.
• Mac OS X Universal Binary, including 64-bit support on Mac OS X 10.5.
• No sub-classing required. Seamlessly adds regular expression support to all NSArray, NSDictionary, NSSet, and NSString Foundation objects with a rich set of Objective-C category additions.
• Unicode enabled. Full Unicode support for NSString objects.
• Extensive, high quality documentation.
• Full source code with a BSD license.
• Uses the BSD licensed PCRE Perl Compatible Regular Expressions library for the regular expression engine.

• Caches the compiled form of the regular expression for speed.
• Multithreading safe, including multiple reader, single writer multithreaded access to the compiled regular expression cache.
• Makes minimal use of heap storage (ie, malloc() and free()), instead allocating most temporary buffer needs dynamically from the stack.
• Uses Core Foundation directly on Mac OS X for additional speed.

• 64 bit support. Pre-built for ppc, ppc64, i386, and x86_64.
• Garbage Collection enabled. Complete support for Leopards Garbage Collection feature.
• Integrated Xcode 3.0 documentation. Get real time API information via the Research Assistant.
• Collection of instruments for Instruments.app.
• RegexKit specific DTrace probe points.