int.NET是一个图像和照片处理软件，它由华盛顿州立大学的学生开发和维护并由微软公司提供项目指导，早期定位于MS Paint的免费替代软件，现在逐渐发展为一个功能强大且易用的的图像和照片处理软件，支持图层，无限制的历史记录，特效，和许多实用工具，并且开放源代码和完全免费，界面看起来有点像Photoshop。该软件的开发语言是C#。
 

* Now requires (and uses!) .NET Framework 3.5 SP1.
* Significant improvements to the installer. Prerequisites are now handled in a much more user-friendly fashion (it's no longer "go to the Microsoft website and decipher geek talk and download stuff")
* The auto-updater can now download in the background, and then install the update after you've exited Paint.NET. Compare this to v3.36 and earlier that jump in your face and require the download and installation to happen right now, and block you from using the program until it's done!
* New effect: Blurs -> Surface Blur, by Ed Harvey
* New effect: Distort -> Dents, by Ed Harvey
* New effect: Distort -> Crystalize, by Ed Harvey
* The responsiveness of effect dialogs has been greatly improved.
* When zoomed-in, the rendering quality has been substantially improved. http://blog.getpaint.net/2008/12/07/pai ... zoomed-in/
* When zoomed in, it is now much easier to correctly resize or move a selection.
* Improved performance when opening multiple images, especially for systems with only 1 processor. http://blog.getpaint.net/2008/09/11/pai ... humbnails/
* Memory usage has been greatly reduces when more than one image is open.
* The selection outline is no longer animated, which substantially reduces CPU usage. It also uses XOR blending.
* The middle mouse button can now be used to close an image tab
* Improved the Unfocus effect
* Fixed an issue with Gaussian Blur and its treatment of alpha values
* Fixed a crash with the "Units" selector in the toolbar area
* Added a "Utilities" menu, and moved the following menu items there: Check for Updates, Language chooser, and View Plugin Load Errors. For the alpha release, there are also menu items for "Force Crash" and "Perform Full GC" (you'll know what that means if you're a developer -- Otherwise it isn't interesting).
* Installer now has a "Start Paint.NET" checkbox at the end. (On Vista and Win7 with UAC enabled, it will correctly start Paint.NET at non-elevated privilege.)
* Renamed "Grid" to "Pixel Grid", to more accurately describe its functionality.
* The DirectDraw Surface (.DDS) file type now allows you to select the resampling algorithm for auto-generated mip-maps
* Effect plugins now have access to a "Services" property which allows them to properly access certain internal Paint.NET functionality.
* Fixed some very small memory leaks when opening many images
* Russian translation. http://blog.getpaint.net/2009/02/26/rus ... -paintnet/
* A processor that supports SSE is now required (almost all CPU's purchased this decade satisfy this)

注意：该软件需要.Net 2.0 的支持，下载