If you don't need them, you don't have to use them. Tails is an excellent operating system for leaving no trace behind on your main hard drive, regardless of all the apps that it comes with. OpenOffice was renamed to LibreOffice so you might want to check libreoffice.org. I don't know, do you need a desktop email reader? It's a torified desktop email client, and works well for that purpose. Better, since it's the original. Most Windows PGP apps are ports of the Linux GnuPG encryption program. That's an alternative anonymous network to Tor. You can ignore it, you don't need it. It's great for scrubbing metadata from images and documents, except PDFs. In my experience, there's a problem with the python library which causes it to blow PDFs up to 10 times their original size. But other than PDFs, it's great for scrubbing metadata.