2d design program, suitable for building design etc, not photoediting.

[BillyTalentx]

Hey people

I've started trying to plan my maps and stuff, but paint and photoshop don't cut it.
Are there any 2d design programs - [b][u]free[/u][/b] - that have a grid and are easy to just draw straight lines on??

Thanks

[Taipan]

Autocad (professional engineering drawing program)
Delta cad (easier to use semi professional)
Paint.net Paint with alot of extra's.

I still prefer pen and paper to design maps but else I think Paint.net would be easiest.

[BillyTalentx]

Autocad and Delta cad aren't free...

Paint.net is rubbish for what i want.

[ambershee]

You could use the orthographics viewports in Radiant (a 3d program for level design). Generally, architectural orientated packages are usually industrial and cost.