Sorry for late reply. Check both system & user account Application support and Preferences folders for anything linked to those companies. These would be the main two I'd suggest. Application folder for the actual applications. Check whether either application installer has an uninstaller or uninstaller within their app folder if they have one.

As for possibility of hidden files, that's a dangerous thing to play with unless you know what to touch & what not to. I'm aware of one utility that can show hidden files.