Hier ein paar Links zu Viewern für verschiedene Datenbanksysteme (habe speziell nach MS SQL gesucht):

Squirrel-SQL (Open Source): “SQuirreL SQL Client is a graphical Java program that will allow you to view the structure of a JDBC compliant database, browse the data in tables, issue SQL commands etc”

iSQL-Viewer (Open Source): “iSQL-Viewer is an open-source JDBC 2/3 compliant database front end written in Java”

xBaseView Database Explorer (Free trial available): “View, print, search, filter and modify your database with just a few mouse clicks”

Kommerziell: SQL Maestro

Nur MySQL:
MySQL Query Browser

Navicat