GFLAx is the ASP component (ActiveX) version of GFL SDK. GFL SDK is a free library (used by XnView) for developers who would like to support graphics image formats easily.
The library exists in 2 versions. The light version supports the most popular formats (PNG, JPEG, ..), and the standard version supports more than 100 formats in reading and 40 in writing ! You can also manipulate and filter your pictures.