is-ready.com allows to write scripts easily. See the following documentation on how to create application with a few scripts.
Define Input Fields at the top of a script.
Write Output to HTML, Text, Tables.
Use Scripts Includes to better structure the scripts.
There are read-to-use scripts for common tasks:
Read Json: JsonDoc
(JSON Document, read from string)
FilesUtil: FilesUtil
(Quick File Access)