Support us with an annual donation and receive: 5 priority bug fixes per month (no accrual), your company's logo on the dlang.org sponsors page, 3 DConf registrations, 7 hours of phone support per month (no accrual), your company's logo in the README of 1 DLang project (dmd, Phobos, DRuntime, etc.), and 1 day of on-site training (travel and accommodation paid by sponsor).
