Image Librarian
From Just Solve the File Format Problem
Image Librarian is an image file cataloguing utility for Windows 3.x, developed by Richard L.F. van Paasen. Its native .ril library format contains information about a set of raster image files: thumbnail images, file locations, and other metadata.
Identification
RIL files start with ASCII "RIL", followed by what is presumably a format version number, e.g. "1.0" or "1.5".
