If you want only to draw pictures, and not do anyhting with them such as analysis or board layout, try MS Paint. It's free, and you can make your own parts collection.
Furthermore you can orient things how you want them - some of the schematic drawing programs don't allow you to, for instance, vertically flip an op-amp so that its inverting input is at the bottom. Nor do some of them allow you to draw diagonal lines
And some of them insist on attaching an "earth" symbol to the common supply line. (Try wearing a hearing aid with a wire connected to earth.)