TWAIN Importer 5.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The latest version of the program can be downloaded for PCs running Windows XP/Vista/7/8/10/11, 32-bit.
We recommend checking the downloaded files with any free antivirus. The actual developer of the program is ScanWorks Software. The most popular versions among the program users are 5.0, 4.1 and 4.0. The program lies within Photo & Graphics Tools, more precisely Viewers & Editors.
From the developer:
Twain Importer is a virtual Twain driver for importing existing images into Twain complaint scan application. It is helpful for unifying operations with images from multifunctional devices (MFP), Network Scanners, E-mails or if your Twain-based capture application does not support some file format (for example PDF documents) or you need to test Twain-based application (especially using Microsoft or VMware virtual technologies).
You may want to check out more software, such as TWAIN DS Sample, SysTools Office 365 Import or Dynamic.NET TWAIN, which might be similar to TWAIN Importer.