The D programming language has been around for several years and has been used commercially in the game industry by Remedy (most notably in Quantum Break). DConf has been running every year since Facebook hosted the 2013 edition. This year it's in London, hosted by Symmetry Investments at a venue operated by Inmarsat near Old Street Station. The sponsors have announced a 50% discount for students, academics, and major open source contributors. Hardship rates are also available for those who would like to attend but can't afford the registration fee.