IOCCC 2014 Now In Progress
leob (154345) writes In case you haven't noticed yet, the 23rd International Obfuscated C Code Contest is now in progress. A pre-announcement was made on Twitter in the end of August; the online submission tool is now available until 2014-Oct-19 18:17:16 UTC.
A particular sin() implementation by IBM has always looked scary to me. I found it via an interesting Stack Overflow thread which talks about trigonometric functions.