A declarative framework for building efficient UIs on Android
...Litho uses Yoga for layout and automatically reduces the number of ViewGroups that your UI contains. This, in addition to Litho's text optimizations, allows for much smaller view hierarchies and improves both memory and scroll performance.
JLoom is a JSP like template language for textgeneration - e.g. source code, HTML, XML. JLoom templates are modular encapsulated. Parameters can be any Java type, even Generics or Varargs. There is a plugin for Eclipse and a command line tool.