Multi monitors were earlier associated with had core programmers and geeks but it has been seen recently that users using multi screens are increasing multi-fold. The demographics of users using multi screens is also changing rapidly. Multiple monitors help increase your screen area , productivity and loads of extra space to spread out the work. Some of the tools you could use to manage a multi-screen system are listed as follows :

DisplayFusion

It is a multi-monitor suite with numerous capabilites and is regarded as one of the most useful tool for multi-monitor systems. It adds taskbar to every monitor. It also supports spanned or monitor-dependent wallpaper with position fine-tuning and integration with Flickr and Vladstudios, and customizable titlebar buttons for window management. It also provides the capability of customizing hot keys for numerous different operations. The free version includes most of the features except the multi-monitor taskbar.

Operating Systems support : Windows

Price : Basic : Free , Pro : $25


Synergy

It is also one of the most popular tools available for users intending to work on multiple operating systems. While most of the other tools provide capability for only single OS whereas Synergy provides support for multiple operating systems. You can seamlessly use keyboard and mouse for all the systems with different OS. For example, Pushing the mouse against the edge of the Windows monitor towards the Mac monitor will slide it right across to the other OS as though they were all running in parallel virtual machines on the same operating system.

Operating System Support : Windows/Linux/Mac

Price : Free


MultiMon

It is a multi-monitor tools designed for spanning the task bar  across multiple monitors. It can support upto 3 monitors at a time. The basic version is free but it doesn’t support system themes whereas the pro version supports the themes. One of the advantages of this tool is the clipboard extender present in it and better integration with Windows shell.

Operating System Support : Windows

Price : Pro : Free , Pro : $28

There are numerous more software in the market which have same basic features but these are the ones that stand out among the list.