Isometric drafting of machinery and piping
I need to illustrate some articles with perspective drawings. They are only meant for readers to understand the text, so they do not be to accurate scale. The objects are items of machinery e.g., machine tools, or piping. I dont need animation, but do need to add text, as titles or names of parts. It should be possible to store the drawing with file extensions which are used commonly, so the reader does not need special software to read them.
Since the volume involved is quite small, I am not keen on buying anything fancy or needing hours of tutorials. Can anybody direct me to inexpensive or free software that may be useful? Thanks.