Gscan2pdf is an open source, cross-platform graphical application for creating PDFs from scanned documents. It is designed to convert scanned documents into PDFs, JPEG, TIFF and other image formats. It can automatically detect page borders, deskew, rotate, and adjust color or contrast. It can also save the output files in various formats, including PDF, JPEG, TIFF, and PNG. Additionally, it can be used to combine multiple scanned documents into a single PDF file. Gscan2pdf is a versatile tool for creating high-quality PDFs from your scanned documents.
Discontinued The program is no longer updated. The latest version, 0.998, released in November 2010, can still be downloaded from the official website.
XSane is used as the basis for many scanning tools (at the top)
Discontinued The project is no longer being developed. The latest version, 20140526_1531, released in May 2014, can still be downloaded from SourceForge.
Development of KOMA Code applications was discontinued in January 2017. The latest version of Scan2pdf can still be downloaded from the official website.
Scan Tailor is a post-processing tool, not a scanning tool.