Scarse is described as 'Scanner CAlibration ReaSonably Easy'. There are four alternatives to Scarse for Windows, Mac, Linux, iPad and iPhone. The best alternative is VueScan. It's not free, so if you're looking for a free alternative, you could try ArgyllCMS. Other great apps like Scarse are SilverFast (Paid) and Profile Prism (Paid).
Third-party software for film scanners and flatbed scanners. VueScan is a powerful, easy-to-use program that: -Scans documents, photos and film -Creates PDF, JPEG, TIFF and TXT files -Supports over 1200 scanners
SilverFast is renowned as the worldwide standard when it comes to scanner and digital imaging software. SilverFast is able to bring out every device's maximum quality and considerably exceed the results of the manufacturer's own software.