I am not aware of any open source OCR software that is doing multi-column document recognition. It's more of a segmentation task, rather than recognition itself, so it should be rather implemented in a front-end, such as OCRopus. If you have a linear text flow, sandwich PDFs can be read by a screen reader smart enough in a reasonable way.
Apart from already mentioned Finereader, old Cuneiform Windows freeware seems to be able to do multi-column.
I am not aware of any open source OCR software that is doing multi-column document recognition. It's more of a segmentation task, rather than recognition itself, so it should be rather implemented in a front-end, such as OCRopus. If you have a linear text flow, sandwich PDFs can be read by a screen reader smart enough in a reasonable way.
Apart from already mentioned Finereader, old Cuneiform Windows freeware seems to be able to do multi-column.