The fourth most popular home operating system, Linux Mint offers great ease of use for those new to Linux. It's based on Debian and Ubuntu and comes with a library of 30,000 free software applications.
Like Red Hat, SUSE is designed for enterprise users and requires a support contract. However, also like Red Hat, a free community version is available through openSUSE.
Suitable both for enterprise and home users, this extremely popular Linux distributions comes in desktop, server and cloud versions and now a TV version. It boasts 20 million users and offers fast performance, a stylish interface, ease of use and good security.
With KeePass, you no longer have to remember lots of different passwords. Instead, you'll only need to keep track of one master password, while KeePass stores your very strong passwords in an encrypted database. Operating System: Windows
Adobe's Acrobat software is expensive, but you don't actually need that software to create PDFs. PDFCreator can write PDF files from any application capable of printing, and it includes features like encryption, digital signatures and more. Operating System: Windows
The free Adobe software isn't your only option for reading PDF files. The Sumatra PDF reader offers similar functionality with a lighter footprint for faster performance. Operating System: Windows
For restaurants only, this POS system works with touch screens and handles operations like split checks, kitchen print, drawer pull, tax, discounts and more. Its list of users includes the Denny's chain in New York. Operating System: OS Independent
Best for small or very small businesses, this Linux-based point of sale system offers features like role-based permissions, support for multiple terminals, sales suspension, custom orders and more. It stores all inventory data in a MySQL database and boasts excellent security. Operating System: Linux
Very similar to Microsoft Project, this popular app lets you assign resources, schedule tasks and handle the other aspects of managing an ongoing project. It also imports and exports Microsoft Project files. However, note that the export to PDF function in the software is shareware, not open source. Operating System: Windows, Linux, Unix, OS X.
Similar to OpenProj, GanttProject can also import and export data from Microsoft Project. Other key capabilities include Gantt charts, PERT charts and collaboration features. Operating System: Windows, Linux, OS X.