Looking for an easy content management script/program to integrate into an existing site

I have numerous clients who would like to be able to add/change small amounts of content on certain pages within sites that I have designed. I normally tell them just to send me the updates and I will do them, but I am getting more and more requests for this option. I used to use a small script called Snippetmaster but that is no longer offered. That allowed me to put a code within a page around the area that the customer could log in to and make changes using WYSIWYG. Any suggestions for easy to use, not expensive scripts/program?

You can have a look on our following scripts:

They are complete solutions for customers who don’t know how to code.
Just give them an easy way to create content!

Best regards.