- *[Caltech Library's Datatools](https://caltechlibrary.github.io/datatools/)*  
Command line utilities for simplifying work with CSV, JSON, TOML, YAML, Excel Workbooks and plain text files or content as well as the string command for working with text strings 
- *[SAML Developer Tools](https://www.samltool.com/online_tools.php)*  
A collection of tools to work with SAML messages/certificates/metadata etc.
- *[Online Diff Checker](https://www.diffchecker.com/)*  
As the name suggests