Enter a sentence to have it translated from English to five different languages and back. The result is often funny; nothing like the original sentence. http://www.tashian.com/multibabel/
A large collection of palindromes, focusing on palindromic single sentences (spelling the same forwards and backwards). Submissions welcome. http://www.mockok.com/
Explaining the seafaring origins of some common words, figures of speech, and everyday expressions, like "toe the line" and "scuttlebutt". http://www.fortogden.com/nauticalterms.html
A collection of links to web pages about palindromes -- phrases that spell the same forwards as backwards, like "Able was I ere I saw Elba". http://www.palindromes.org/