update documentation.md

- fix missing noun in first sentence
- make clear that this is docs for the library
- include a sentence pointing to the many other projects

Author: orbeckst

pages/documentation.md

@@ -4,7 +4,9 @@ title: Documentation
 order: 3
 ---
 
-MDAnalysis is an open-source, available under the [GNU Lesser General Public License, version 2.1 or later (LGPLv2.1+)](https://www.gnu.org/licenses/lgpl-2.1.html). MDAnalysis provides **comprehensive documentation** to help users at all levels—whether you're just getting started, developing new tools, or contributing to the project. From **step-by-step tutorials** to an in-depth **API reference**, these resources will guide you through installing, using, and extending MDAnalysis.
+The MDAnalysis library (`import MDAnalysis`) is open-source code, available under the [GNU Lesser General Public License, version 2.1 or later (LGPLv2.1+)](https://www.gnu.org/licenses/lgpl-2.1.html). MDAnalysis provides **comprehensive documentation** to help users at all levels—whether you're just getting started, developing new tools, or contributing to the project. From **step-by-step tutorials** to an in-depth **API reference**, these resources will guide you through installing, using, and extending MDAnalysis.
+
+The MDAnalysis Project maintains many other software projects related to working with data in the molecular sciences, which can be found under the [MDAnalysis GitHub organization](https://github.com/MDAnalysis).
 
 ## User Guide
 The [User Guide]({{ site.docs.userguide.url }}) is the best place for new users to start. It includes: