Latest level filesets for C&C++ Compilers for AIX 3.6.6:

Note - the 3.6.6.0 level of this compiler is a product refresh. 
It is available here with a try and buy license.  This product
refresh will continue to work with any existing product licenses
enrolled for previous levels of the 3.6 compiler.  However,
it is important that any existing license files be backed 
up (i.e. /usr/ibmcxx/cxx36_c.lic, /usr/ibmcxx/cxx36_cn.lic)
in case they need to be enrolled again in the future.

  ibmcxx.cmp                 3.6.6.1  
  ibmcxx.html.DBCS.search    3.6.6.1
  ibmcxx.html.common         3.6.6.1 
  ibmcxx.html.en_US.doc      3.6.6.0
  ibmcxx.html.en_US.search   3.6.6.0
  ibmcxx.include             3.6.6.0 
  ibmcxx.ioc.include         3.6.6.1
  ibmcxx.ioc.lib             3.6.6.1
  ibmcxx.ioc.rte             3.6.6.1
  ibmcxx.ioc.samples.bin     3.6.6.1
  ibmcxx.ioc.samples.source  3.6.6.0
  ibmcxx.ioc.source          3.6.6.1
  ibmcxx.lib                 3.6.6.0
  ibmcxx.memdbg              3.6.6.0
  ibmcxx.msg.Ja_JP.cmp       3.6.6.0
  ibmcxx.msg.Ja_JP.ioc.rte   3.6.6.1
  ibmcxx.msg.Ja_JP.rescmp    3.6.6.0 
  ibmcxx.msg.en_US.cmp       3.6.6.0
  ibmcxx.msg.en_US.ioc.rte   3.6.6.1 
  ibmcxx.msg.en_US.rescmp    3.6.6.0
  ibmcxx.msg.ja_JP.cmp       3.6.6.0 
  ibmcxx.msg.ja_JP.ioc.rte   3.6.6.1
  ibmcxx.msg.ja_JP.rescmp    3.6.6.0
  ibmcxx.msg.zh_CN.cmp       3.6.6.0 
  ibmcxx.msg.zh_CN.ioc.rte   3.6.6.1
  ibmcxx.msg.zh_CN.rescmp    3.6.6.0 
  ibmcxx.rescmp              3.6.6.0 
  ibmcxx.rte                 3.6.6.0 
  ibmcxx.cmp                 3.6.6.0
  ibmcxx.html.DBCS.search    3.6.6.1