Downloading TeXPPT 1.0 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The following version: 1.0 is the most frequently downloaded one by the program users.
The actual developer of the free program is Xavier Lacroze. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software lies within Office Tools, more precisely Document management.
From the developer:
TeXPPT is a lightweight add-in for Microsoft PowerPoint that lets users input LaTeX source code directly in your presentations. eXPPT requires a working installation of MiKTeX, Ghostscript and pstoedit.
TeXPPT only works with PowerPoint 2007 or 2010.
You may want to check out more software, such as PDF Converter Professional, GnuWin32: Sed or Gallery Constructor, which might be related to TeXPPT.