The best replacement for ucm is base clearcase.

The best alternatives to ucm are rated as following:
★★★★★  base clearcase
★★★★  ucr
★★★  northwest
★  documentum
★  arima
★  nwms
★  lindenwood
  umkc
  ibm filenet
  ucsc

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

Other search terms related to ucm and their ratings are:
★★★★★ webcenter
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base clearcase
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