The best replacement for sqlcmd is osql.

The best alternatives to sqlcmd are rated as following:
★★★★★  osql
★★  bcp
★  sqlplus
★  invoke-sqlcmd
★  xp_cmdshell
★  isql
  sqlcmd

Your alternative for sqlcmd is not listed? Suggest!
Speaking about sqlcmd, one probably shouldn't forget about sql file.

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



Google Trends

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sqlcmd
osql
bcp