This paper presents a new design tool (CALD) for logical circuit design. This system is shown to be powerful because of its relationship with an HDL language and thanks to a user friendly drawing interface which allows both automatic and manual connection drawing processes. The system is limited to circuit drawing generation while actual physical simulation is not considered. This paper carries out a comparative analysis of the CALD along with classic similar tools from the market, such as B2Logic, EWB, Circuit Maker. The discussion is illustrated through Windows environment applications. The CALD is mainly an education-oriented tool; so synthesis oriented design systems such as Viewlogic, Orcad, Altera or Xilinx Foundation are not dealt with.