-100% system-friendly! Runs on all Amiga systems
-your application can be shown in window on Workbench or on an own screen
-transparent windows on Workbench (see screenshot)
-transition effects
-functions to scroll graphics smoothly
-transparent graphics
-compiler and linker to create your own executables
-easy monitoring of user input (keyboard, mouse)
-DOS functions
-string functions
-math functions
-variables and arrays
-applications run independent of the current screenmode
-compatible with older Rainboot versions
-different fonts can be used
-supports anim brushes
-supports sound modules and samples
-conditions (if, else, elseif, endif)
-loops (for, next, while, wend)
-system functions
-can still be used during booting
-MorphOS and AmigaOS4 versions planned!
-and much more!

The interesting thing is, that Rainboot4 does all the work for you. For example,
the following script opens a window with the file mypic.iff as the background
an writes "Hello World" centered in this window:

%BGPIC1=mypic.iff

%CODE
%Locate(CENTER,CENTER)
%PrintStr("Hello World")
%WaitLeftMouse
%Quit

This simplicity is used by all functions of Rainboot4. And it's fully system
friendly. All operations are executed through the operating system or the
RTG system respectively. It was never easier to code intuitive programs
with such little effort but maximum effectivity and user friendlyness!