Sparkle is an easy-to-use software update framework for Cocoa developers.

But this little framework's got a lot of features packed inside! Check 'em out:

• True self-updating--no work required from the user.
• Uses appcasts for release information.
• Displays release notes to the user via WebKit.
• The user can choose to automatically download and install all updates.
• Displays a detailed progress window to the user.
• Seamless integration—there's no mention of Sparkle; your icons and app name are used.
• Supports authentication for installing in secure locations.
• Supports DSA signatures for ultra-secure updates.
• Really, really easy to install.
• Sparkle requires no code in your app, so it's trivial to upgrade or remove the module.

New in Sparkle 1.5:

• Optionally sends user demographic information to the server when checking for updates.
• Supports bundles, preference panes, plugins, and other non-.app software.
• Dual-mode garbage collection support for any memory management style.
• Supports branches due to minimum OS version requirements.
• Sparkle doesn't bug the user until second launch for better first impressions.
• Deep delegate support to make Sparkle work exactly as you need.
• Sparkle can install .pkg files for more complicated products.
• Tons of other stuff! Read more about what's new.

With Sparkle, you're in good company. Here are just a few of the hundreds of apps which use Sparkle:

Sparkle is developed and maintained by Andy Matuschak with the help of dozens of valued contributors.