You could have downloaded JCE 2.0 from our software library for free. This free tool was originally created by joomlacontenteditor. The software relates to System Utilities. The most popular version of the program is 2.0.
From the developer:
JCE makes creating and editing Joomla! content easy.
Add a set of tools to your Joomla! environment that give you the power to create the kind of content you want, without limitations, and without needing to know or learn HTML, XHTML, CSS...
You may want to check out more software, such as Jove Chart Editor or CrococryptLib, which might be related to JCE.