I am always looking for a better SQL Editor for Microsoft SQL 2008 or above on Mac. Have never found any which were free and good as well (not I know of). Then I came across SqlPad its base on Node.js hence its quite fast and low on resource. Also It is open sourced :).
SqlPad is a self-hosted web app for writing and running SQL queries and visualizing the results. Its goal is to be a simple tool for exploratory data work and visualizations, ideal for data analysts who would prefer to work in SQL.
SqlPad is meant to be run on an internal network for a single team. All connections added to the app can be used by all individuals with access to the SqlPad server. All queries written can be run and edited by everyone on the server.
For more details on installing and running a SqlPad instance, see the Installation and Administration page.
I am really impressed by it, try it out I am sure will like it too.