… You should mention what technologies you are using (because listing WCF or Java will save me the hassle of applying, and you the hassle of rejecting me), but don’t list specific tools, languages and frameworks as requirements.
Good developers who know Rails can learn Django or Node.
Going between Oracle, SQL Server, MySQL and Postgres is all pretty trivial.
… I remember being asked quite eagerly, during a pre-interview, if I knew a specific view engine (like erb, or haml…).