When building stuff I often need some sort of bracket or other fixture involving sheet metal. This is just a quick tip on how I make mine.There are tons of CAD software, some useless, some overkill, but this free software fits my bill.http://www.emachineshop.com/machine-shop/Download/page100.htmlThis software is proprietary for the company and designed to be used for ordering part from them, but the CAD program is user friendly and has a built in 3D viewer. And I only need a printout of the drawing for my work.
Designing is straight forward and you many tools to your disposal, like bend lines.
You can check the 3D version at any time to see if it looks like the part you are designing.
When the design is finished I print it out in scale 1 to 1 on regular paper and just glue it on the sheet metal using water solvent glue. This will hold it in place during cutting, drilling and other work. This method is probably bleeding obvious for many of you, but some might find it useful.
When the whole thing is done, I just stick the part in soapy water and wash off paper and glue.