If you did not have a bash script already, I'd tell you to do as per the answer given by XXXXXX.

But if your already have a bash script (say, named ~/open_apps.sh), you can create an Apple Script with the Script Editor application that says:

do shell script "~/open_apps.sh"

And then, Save the script to your Desktop, for instance, using Application as the file format, leaving unchecked the checkboxes for Show startup screen and Stay open after run handler.

If you did not have a bash script already, I'd tell you to do as per the answer given by user3439894.

But if your already have a bash script (say, named ~/open_apps.sh), you can create an Apple Script with the Script Editor application that says:

do shell script "~/open_apps.sh"

And then, Save the script to your Desktop, for instance, using Application as the file format, leaving unchecked the checkboxes for Show startup screen and Stay open after run handler.

After that, you can now launch that script (and hence your applications) by double clicking your new AppleScript application.