NetRexx is an open source, originally IBM's, variant of the REXX programming language to run on the Java virtual machine.

The latter offers the standard Rexx data type that combines string processing with unlimited precision decimal arithmetic.

[2] IBM announced the transfer of NetRexx 3.00 source code to the Rexx Language Association (RexxLA) on June 8, 2011.

[7] The 0.50 release, from April 1996, contained the NetRexx runtime classes and a translator written in REXX but tokenized and turned into an OS/2 executable.

IBM finally announced the transfer of NetRexx source code to the Rexx Language Association (RexxLA) on June 8, 2011, 14 years after the v1.0 release.