I'm not sure how this is a math question... but there are many possible answers.
There is something called "Shareware" that they give you a sample of a larger program (usually games). The idea for this one is, you like it so much you share it with your friends (thus the name) and you all go buy the full version.
It could be packaged with something else, in which case the company packaging it most likely feels they'll get more sales from the both combined than one alone, and thus make more money.
In MMOs, the "Free-to-Play" concept is becoming more popular. The idea here is that they get a lot of people who can't afford to, or don't want to, pay a monthly subscription to play their game. Then they offer stuff for sale to the customers, who don't have to buy it to play and enjoy the game. The main thing here is they have many more people playing than without it, and some of those people *will* buy stuff. So they come out ahead in the long run than if they just charged a fee.
Or, the person who made the software could just want to give it away for some reason, and they're not trying to get rich off it. An example of this is Open Office. Usually, though, whoever either made or is selling the software has other software as well, and they're hoping if you liked their one product that was free, you'll go back to them and buy their other products.
Sometimes, the person just really doesn't care about making money off it.
As far my knowledge, all softwares are created using basic software which is available. For example, consider ubuntu (though its os) the base version is linux which is free to modify. Same way for other applications also. If we read more in details about the software we will get its base.
Now coming to the point, as officially the ideas should be implemented on the company product only where we got lots of obstacles on implementation. So versed programmers used to produce their ideas freely based on the free software and so to prove their knowledge they used to give if free for others or in others name.
On my search, i have found equivalent free software (not shareware, open source) to every kind which is more than enough for an moderate user. Sometimes we get good support also online.
The only problem in using the opensource software is we need to search a lot till we get a knowledge on the software. Whereas on paid, we just need to ring or post a question and we get a reply back. If you have time and patience, open source softwares are more than enough to work with on any conditions.
Zoombinis can not be played free on line anywhere. You have to purchase and download the software in order to play this game.
There are several websites where worksheets for Algebra 2 can be downloaded and printed out. Some of the most popular include "Kuta Software", "Homeschoolmath" and "Mathsisfun". These sites are free to use.
If you get 3d software (many are free, but some of the higher-end ones can be hundreds or thousands of dollars), you can make a 3d model of almost anything with enough effort and time.
There are several free math problem solvers, many of which can handle basic word problems. One example is at basic-mathematics.com, but it looks like there are some at algebra.com and intmath.com, and several other sites. Remember that software like this can have glitches just like any other software, and that you have to understand the basics of math in order to enter your problems correctly, so don't trust the programs blindly.
Matlab is a licensed software. But if we require Matlab material or documentation, we can get it from its official website.
Some is and some is not.
Luckily, people do not have to spend money to utilize free tax software. There are several online sources that provide this type of software. Irs.gov has a list of free software providers and TurboTax's website also has free tax software available.
There are certain tax software programs that are free while some require a small fee. Some free tax software programs are not as reliable as others.
There is some free software that one can use with construction estimating. The software Construct Now is software available for free that can help with estimations.
"Yes, there is some data encryption software that is available for free. Some other data encryption software has a fee. Sometimes, you can find data encryption software that costs a fee after a free trial offer."
Some busienss options for free backup software include: Toucan, Fbackup, GeneieTimeline Free, and Backup Maker.
Yes, there a some good free business accounting software available online. Sites like openoffice.org are great places to find some selections of the free software available.
There are some companies that offer this software for free to their members. Practice Suite is one of the few websites that offer this software to their members for free.
You can find some free federal tax software at www.taxact.com. On this site you can download the free Tax ACT software that will allow you to file your taxes for free.
The price of stock analysis software varies in prices. Some software is actually free to download and use. Some have free trials while some software costs up to $100 per month.
There is no site that offers free employee evaluation software. You will find that some companies offer a free trial so you can try out the software. Some companies also offer guarantees so if you do not like the software, you can get your money back.
Some sites require a registration but some sites offer free software services. One cloud computing service provider that offers free software services is the iCloud which has both free and priced software for using.