You don’t need to setup world clock in your computer anymore. If you are a Linux user then your terminal will server the same purpose. Now from your terminal you can get world time, yes for all the countries. We use Google or other search engines to view time of any country online.
Evernote is the most popular work space application nowadays and you can keep anything of your mind like notes, images, audio/video clips, web bookmarks, web clips for your use. Aprt from web version Evernote provide beautiful tool for Windows and MAC. But for Linux users? Yes, you can install Evernote on Linux too. The Linux version is called Everpad. Here is the process to install on Linux.