We are pleased to announce a second round of confirmed presentations. There is more to come as we are still reviewing a number of proposals. Mathematics track * "An Introduction to Sage", by Arvind * "Calc: GPU enabling a spreadsheet", by Michael Meeks Tracing and debugging track * "Who ate my battery?", by Jeremy Bennett Mail track * "Dovecot's way of scaling to millions of users", by Timo Sirainen * "Mailpile", by Bjarni Rúnar Einarsson * "Postfix open source mail server - lessons learned and recent developments", by Wietse Miscellaneous track * "F-Droid", by Daniel Martí * "HTML5 Video Part Deux", by Michael Dale * "The Wikipedia stack", by Erik Moeller * "USE OTR or how we learned to start worring and love cryptography", by David Goulet Hardware track * "ARM: Allwinner sunxi SoC's", by oliver * "OpTiMSoC", by Philipp Wagner More information at https://fosdem.org/2014/schedule/