free open source program

Octave

Need something to help you understand all those complicated math equations in a breeze? Octave can help you out in that department. If you think that MatLab is awesome and want a similar type of software minus the dent in your pocket, Octave is your man. The program is the open source version of the commercial math program, MatLab. Despite being offered absolutely free, Octave still manages to stand up to its expensive counterpart. It provides an easy way for you to solve linear and non-linear mathematical problems. The program also works together with its paid counterpart so using it is a breeze if you are already familiar with the former. Solving math problems has just become so much easier with this cool new program. Check it out.

TeraCopy

If you need to copy tons of files fast, then use TeraCopy. This handy utility promises to copy single files or even batches of files; moving them from one location to the other, in a fast and convenient way. Moreover, there's also a portable version that you can carry around with you. TeraCopy is an excellent tool to have if you regularly have to move big batches of files from one system to another. It considerably speeds up the process compared to that of Windows. If you think that it's not really necessary, give it a go first and you'll certainly be impressed at how fast in can copy your files. The program is available for free download anyway and it offers plenty more features than your regular Windows utility.

Cut & Paste

Cut & Paste isn't your typical sidescroller game. This cute and engaging game was actually a finalist in IGF China 2010. The game features unconventional gameplay, where players will need to cut and paste objects in order to complete puzzles and obstacles. In the game, you can use a handrawn character to move from left to right. The entire game is like a big flipbook and your character can jump from one page to the next. You can also go back several pages if you need to. As you go through the pages, you sometimes encounter pictures that are of a different shade; you can cut these and keep it in your inventory. Easily paste it onto another page that requires the item that you obtained. Definitely a cool game you should try out.

Sage

Need help with geometry, algebra or any other number calculations? Sage is a helpful tool you can download for free and serves as a great open source alternative to commercial mathematics softwares like Mathlab and Mathematica. It can help you with any or almost all of your calculating needs. This helpful program was initially released in 2005 under a GNU Public License. As mentioned, it can help you with pretty much anything you might need when numbers are involved. From "algebra, calculus, elementary to very advanced number theory, cryptography, numerical computation, commutative algebra, group theory, combinatorics, graph theory, exact linear algebra and so much more," the program is your one-stop-shop for all of your computation needs.

FotoMorph

Need a program that works great in helping you morph two faces into one? FotoMorph is a free software that you can use to create fun morphing animation of your favorite portrait pictures. Turn a cute little boy into a roaring lion or maybe turn Justin Bieber into Miley Cyrus. We've seen this technique done in many programs and videos, so now, you can make one for yourself to impress friends, amuse yourself or maybe even for work.

Sweet Home 3D – decorate your home using Windows, Mac or Linux

Redecorating your room or your home can be a headache, especially if you don't know which goes with what, or if this furniture would fit in a small space. But here's a software that home interior designers, decorating enthusiasts and home/apartment owners would definitely like: Sweet Home 3D. Sweet Home 3D helps you visualize whatever floor plan you may have. Available for all platforms, it allows you to add and modify furniture, make rooms, configure size adjustments and preview them all in 3D as if you are a professional interior decorator or a seasoned architect.