Extended properties editors for Teradata

List of tools that allow editing of SQL Server extended properties .
Direct - read and save extended properties from SQL Server database.
Repository - edit metadata in separate repository and enable synchronization.
Custom fields - whether tool enables editing custom extended properties, apart MS_Description.

Elasoft SqlSpec (discontinued)

SqlSpec is a database documentation tool that will generate easy-to-read database documentation for almost all platforms. It has both GUI and command line interface. It enables you to generate entity-relation diagrams.

Generate documentation: Yes
Type: Direct
Extended properties: Just MS_Description
Commercial: Commercial
Free edition: No

xSQL Documenter

xSQL Documenter provides comprehensive, uniform, and easily navigable database documentation in HTML and compiled CHM format. xSQL Documenter allows you to edit extended properties on a live server from the generated documentation. It provides the ability to define your own extended properties on columns, indexes, triggers, parameters, etc that appear integrated into the documentation.

Generate documentation: Yes
Type: Direct
Extended properties: Custom fields
Commercial: Commercial
Free edition: Yes