Wire Pilot

[Troken]

Great program and plug-in (works in XnView I suppose). Removes unwanted wires, scratches, dust etc. Try it... oh yes its free.
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Wire Pilot is photo retouching software specially designed for wire removal. The software allows you to retouch wires, posts, antennas and other unwanted linear objects from a photo. As a true master, with this program you'll be able to quite easily retouch digital photos to enhance the outdoor scenes.

http://www.colorpilot.com/wire.html