Nitro is a free and open-source task manager, it comes with a simple user interface which is customizable with many pre-loaded theme as we have seen on the earlier release of Nitro task manager in this post.The new release of Nitro task manager allows you to synchronize your tasks with Ubuntu One and Dropbox cloud storage.
Syncing your tasks with Ubuntu One or Dropbox will allow to access your tasks from other computers or mobile devices. By selecting any of the syncing method using Ubuntu One or Dropbox either way it will take you to the web browser to authenticate your account with Nitro Task manager applications.
[How To]: Install Nitro Task Manger on Ubuntu 12.04 LTS Precise Pangolin Using PPA
Nitro task manger is available to install using PPA on Ubuntu 12.10 Quantal Quetzal, Ubuntu 12.04 LTS Precise Pangolin and Ubuntu 11.10 Oneiric Ocelot.
sudo apt-add-repository ppa:cooperjona/nitrotasks
sudo apt-get update
sudo apt-get install nitrotasks
For Arch Linux users Using “AUR”
Download Nitro 1.3 “nitrotasks_1.3.tar.gz”.
Also you could use Nitro task manager through Google Chrome or Mozilla Firefox web browsers Check the official page of Nitro task manager for more information.