Kaxaml is described as 'lightweight XAML editor that gives you a "split view" so you can see both your XAML and your rendered content (kind of like XamlPad but without the gigabyte of SDK). Kaxaml is a hobby and was created to be shared, so its free!'. There are more than 50 alternatives to Kaxaml for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and .NET Framework. The best alternative is Notepad++, which is both free and Open Source. Other great apps like Kaxaml are Microsoft Visual Studio (Free Personal), Eclipse (Free, Open Source), Qt Creator (Free, Open Source) and Pinegrow Web Editor (Paid).
Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft. It is used to develop computer programs for Microsoft Windows, as well as web sites, web applications and web services.
Pinegrow is a Mac, Windows and Linux web editor that lets you build responsive websites faster with live multi-page editing, CSS & SASS styling, CSS Grid editor and smart components for Bootstrap, Foundation and WordPress.
MonoDevelop enables developers to write desktop and web applications on Linux, Windows and Mac OS X. It also makes it easy to port .NET applications created with Visual Studio to Linux and Mac OS X maintaining a single code base for all platforms.
Aptana Studio is a complete web development environment that combines powerful authoring tools with a collection of online hosting and collaboration services that help you and your team do more. Includes support for PHP, CSS, FTP, and more...