Slingshot!

Slingshot! is an Open Source plug-in for connecting Grasshopper to relational databases

Slingshot! features collection of components for reading, writing, and managing relational database systems using SQL.

Slingshot! Returns

It has been awhile...  here is the latest!

http://www.theprovingground.org/2013/12/return-of-slingshot.html

PS. Have you checked out the source? https://github.com/archinate/Slingshot/