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Java Advent: The JVM Programming Advent Calendar- Lean UXmas 2015: The top articles from 2015's Agile & Lean UX News
- Performance Calendar: The speed geek's favorite time of the year
- Perl 6 Advent Calendar: Something cool about Perl 6 every day
- Perl Advent Calendar 2015: 2015 twenty four merry days of Perl
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