The Penguin key is a nice touch. Jack Wallen/ZDNETZDNET’s key takeawaysLinux has tons of productivity tools waiting to help.There are both GUI and command line apps available.All of the tools listed are free to use.When you think of productivity, I’m sure the usual suspects come to mind:Office suiteGroupwarePDF creators/editorsImage editorsFile managersContent Management Systems (CMS)To-do listsProject management toolsAnd much moreTo assume those are the only productivity tools available would be a mistake, as there are so many to choose from. Of course, what you use depends on your needs, so the collection of apps you use will likely differ from those I prefer.Even so, there are so many Linux apps to choose from, some of which are much lesser-known than the likes of LibreOffice or GIMP. You might be surprised to know that some of those obscure apps are really quite helpful.Let me see if I can pique your interest in a few handy apps that might just make you a bit more productive.Also: Thinking about switching to Linux? 9 things you need to know1. ManuSkriptManuSkript More