Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
XML Copy Editor - XML Copy Editor is a fast, free, validating XML editor.
Knack - Knack is the easiest, most spectacular business management software available.
Oxygen XML Editor - Oxygen XML Editor provides a comprehensive suite of XML authoring and development tools.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
Liquid Studio - XML Tools Provider: XML Studio - Graphical XML Schema Editor.