Is it safe to use Portableapps on public computers?

Provided the public computers mentioned allow running executables, the applications we provide are indeed safe to use on public computers.

Personally-identifiable information is removed when applications are closed.
There may be some non-personally-identifiable information that remains that is generated by Windows itself, depending on the computer and user account in use.

Spyware/malware/viruses are not permitted in any of our applications, and each application release is virus-scanned prior to release.

We recommend practicing Safe Portable App-ing, particularly when using public computers.
To be even safer, you may wish to have real-time virus scanning for your drive, available as part of the PortableApps.com Carbide.