The best replacement for orcad is altium.

The best alternatives to orcad are rated as following:
★★★★★  altium
★★★★★  allegro
★★★★  pads
★★★  multisim
★★★  pspice
★★  protel
★★  proteus
★  dxdesigner
★  kicad
★  cadstar
★  diptrace
★  autocad electrical
  cadence
  altium designer
  ultiboard

Your alternative for orcad is not listed? Suggest!
Speaking about orcad, one probably shouldn't forget about pspice.

Other search terms related to orcad and their ratings are:
★★★★★ pspice
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Google Trends

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orcad
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