Two extensions for Altium Designer --  ICD Stackup Planner and ICD Power Distribution Network (PDN) Planner -- are accessible from within the design tool. 

ICD Stackup Planner adds simulation speed, ease of use and accuracy.  Provides impedance control for rigid-flex design in the Altium environment, from concept to fabrication. Includes 8,800 part dielectric materials library for simulation of actual fabricator materials. Unique field solver computation of multiple differential pair definitions per layer. Automatically creates high-speed design rules in Altium Designer. Capacitor library of 5,000 parts permits simulation and optimization of actual capacitors extracted from manufacturer’s SPICE models. ICD PDN Planner has a frequency range up to 100GHz, for analyzing AC impedance of each on-board PDN, including capacitor selection, to ensure a broad spectrum of noise reduction, giving a concise graphical view of the entire network including plane resonance peaks.

Altium, www.altium.com