When comparing Tk vs Sciter, the Slant community recommends Tk for most people. In the question“What are the best cross-platform GUI toolkits?” Tk is ranked 12th while Sciter is ranked 16th. The most important reason people chose Tk is:
Bindings for Python, C, C++, Ruby, Perl, Go, Java, Haskell and more, see [Languages with a Tk binding](https://wiki.tcl-lang.org/page/Languages+with+a+Tk+binding).
Ranked in these QuestionsQuestion Ranking
Pro Bindings for several languages
Bindings for Python, C, C++, Ruby, Perl, Go, Java, Haskell and more, see Languages with a Tk binding.
Pro Easy Styling
Once you understand how to style, the styling can look great
Pro Great for beginners
Easy to pick up and run with it.
Con Base looks are garbage without a good amount of styling
Going with the base look for your app is a bad idea because it looks like garbage with the defaults
Con C# support lacking
Although the Eagle Project exists, which offers Mono and .NET Core support, C# support is not standard.
Con Linux version is not very mature
The Linux version is missing HTML/CSS features when compared to the Windows version.
Con Not fully HTML5 compliant
Lacking HTML5 functionality and W3C standards: grabbing a library like JQuery or Bootstrap and use it in Sciter will not work.
Con Not WYSIWYG
Not WYSIWYG like WebForms or WPF.