The book may be one that isn't hurt much by the abridgments that are most often the only available hard copies, but the unabridged Gulliver's Travels by Jonathan Swift is online here, here, here, here and elsewhere.
It's been made into several movies. The 1939 version animated by Max Fleischer can viewed online or downloaded here at the Internet Archive and is also available from Google Video:
The 1960 take was called The 3 Worlds of Gulliver. In 1977 Richard Harris played the Gulliver part. A 1996 version starred Ted Danson as Gulliver.