File created in the Coordinates eXport Format (CXF), a text file format used for storing vector maps and images; often used for vector maps but can also be used for any vector image; can be edited with CXeditor and exported to .AI, .XAML, .SVG, .EMF, .KML, and HTML5 formats.

File created by Cuttlefish, a network visualization tool; saves the vertices, edges, weights, and other values for an undirected or directed graph; used for network research and visualization.

Cuttlefish features several advanced network layout algorithms that automatically plot the visualization.

File created by Picasa, a free image editor and image sharing program developed by Google; created alongside the .JPG image when the user saves a collage; stores paths to the images that were used to create the collage, as well as the positions of the images in the collage.

If you move a collage JPG file, you should also move the associated CRX file or the collage will not be reconstructed properly in Picasa from the new location. Therefore, make sure to copy the CRX file when moving your collages.