The best replacement for openmanage is hp insight.

The best alternatives to openmanage are rated as following:
★★★★★  hp insight
★★★★  drac
★★★  openmanage essentials
★  management console

Your alternative for openmanage is not listed? Suggest!
Speaking about openmanage, one probably shouldn't forget about esxi 4.1.

Other search terms related to openmanage and their ratings are:
★★★★★ esxi 4.1
You have in mind a companion for openmanage and it is not yet here? Propose!



Google Trends

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openmanage
hp insight
drac