The best replacement for pgi is intercall.

The best alternatives to pgi are rated as following:
★★★★★  intercall
★★★★★  cli canon ink
★★★★  egi
★★★★  pge
★★★  cli
★  cli ink
★  aiims

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

Other search terms related to pgi and their ratings are:
★★★★★ openmpi
You have in mind a companion for pgi and it is not yet here? Propose!



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pgi
intercall
cli canon ink