While these are the highlights, you’ll want to explore both programs more in depth to decide which one you prefer. Both are free, and both are open-source. Each one has features that make it more appealing to certain users than the other. In the end, it will depend on what you require in your encryption software, and which one provides most, if not all, of the needs.
You can find Free OTFE at http://www.freeotfe.org and TrueCrypt at http://www.truecrypt.org.
Fore more information, check out our detailed Free OTFE and TrueCrypt reviews.