On Fri, 1 Feb 2013 04:31:16 +0000 (UTC), John Doe
wrote:

http://www.homedepot.com/catalog/pro...2077ee_300.jpg

I'm mainly interested in the drill-driver attachment. Apparently
it includes a speed reduction gearbox and the right angle gear.

Are there any other tools like that? Or anything else similar?

Thanks.

Yes. Plenty of drill attachments for right angle drilling.

Using a variable speed drill is better so to handle the gear speed.

Not sure why you need an attachment specifically for gear reduction.

http://media.toolking.com/catalog/product/cache/1/image/800x600/9df78eab33525d08d6e5fb8d27136e95/m/i/milwaukee_3107-6_03.jpg

.... just sayin'