Randem Systems Support Board

You can use the [Task] section of Inno Setup to install each application. The user can check which applications that they want installed and your script can install them.
 
You can check in Inno Setup Help section and the samples provided by Inno Setup at http://www.jrsoftware.org

I would like to know if there is some example or sample.iss for making one single setup which would install multiple applications by one setup , I would like to know how can I add all the files of multiple application to one install and then install them one by one because of they are installed all at once then it would create a problem because my requirment is to install each application and its files one by one and then other application and its files and so on all in steps , I would mind making Next Button steps which user would click to install next or all in silent which ever is easy and I can find some examples of .