Here a number of specialised technical design tools can be found for the broadcast industry.
CADesign tools (software) are use to facilitate the design of electronic circuitry. Design a 128 tap digital filter by hand and it can easily seen that a computer is needed. Likewise analysis software to preliminarise a design idea. For users of the radiospurs browser/helper site a collection of computer aided tools have been prepared.
Since this site is orientated to Broadcast engineering, most of what you will find here is related to "power" RF and microwaves.
Sponsorship is welcomed from manufactures wanting to incorporate component design data in in the database. Spice models welcomed.