CTP 5.6.4 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions among CTP users are 5.6, 1.8 and 1.4. This tool was originally created by Crater Software Inc. The program is included in Photo & Graphics Tools. The program's installer files are commonly found as Ctp.exe, Ctp18.exe or Customs Track Plus.exe etc. We recommend checking the downloaded files with any free antivirus.
From the developer:
CTP is software specifically designed for broadcast and film quality animated series production. To run the CTP you only need a standard Windows computer, a simple scanner and a graphics tablet if applicable.
This software is ideal for all cartoon freelancers and producers, because it simplifies enormously their work flow: with a simple click on their mouse, cartoonists will achieve what previously took several hours.
You may want to check out more software, such as Microsoft Visual Studio Async CTP, Open XML SDK Productivity Tool CTP for Microsoft Office or Comfort Typing Pro, which might be related to CTP.