V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ITP
       Intend / Intent To Package (slang, Cygwin)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ITP
       Intent to Package (Linux, Debian)


The Free On-line Dictionary of Computing (30 December 2018):

Intent to Package
ITP

    (ITP) A notice, posted to the Debian developer
   mailing list, announcing a developer's intent to make a new
   Debian package, including a brief description of the package
   and its license.

   (2000-05-31)