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There are so many open source utilities that we all use like maven, subversion, etc. and all these open source platforms. How do these developers make money?
I can think of four ways:
1) The open source project is a side project and have a job as their source of income
2) They have a corporate sponsor that pays the devs a salary
3) They develop their OSS project and then sell services based on that project (ie, I give away MySQL for free, and do consulting installing and maintaining MySQL for companies
4) They develop a base version of the OSS project, and then develop and sell commercial add-ons for it
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I am developing client server application using ASP.NET together with MySQL. This solution will be hosted using VPS and of course I will install MySQL in VPS.
This web based application is a customized solution based on my customer requirements and I have no idea whether I can use MySQL community edition or I have to pay?
Thanks in advanced.
The question (and the answer) does not apply to MySQL only, but to all GPL-licenced software.
There is nothing to pay to use a piece of GPL software. MySQL Community edition is licensed under the GPL-v2 licence.
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I am slowly starting to build myself a small game engine using openGL and C++ and I thought it would be kinda nice to make it open source for the time being, problem is that I may want to eventually market it once I add in more unique or detailed features. I know most licenses for open source software state that future versions must also be open source, but given that it would be my program, would I be allowed to eventually stop making it open source?
Depend on the Open Source License you use and the way you set up your project. You could use the BSD/MIT licence and then you don't have the viral problem of the GPL/LGPL (but not the advantages either). You can also leave your main engine Open & Free and just sell your unique features.
There is many ways!
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I want to create a website in JSP and the database will be MySQL. I will host the website on the internet. Is it required to obtain any licence to develop them on my machine?
As http://mysql.com/products/ states, MySQL database has 4 editions.
For development it is enough to use community edition, which is distributed under GPL license, which is open-source license.
You don't need anything.
No it'f free if you don't intend to sell the product including the mysql database software. Found here.
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I have writen an app for the computer in java, but i don't want to give it out for free. I only want to charge somewhere between $0.99 - $2.99, is there a website that i can upload it to, to do this for me. I am looking for something like the apple app store, or the android market, but for the computer. Does this exist?
A quick google search came up with this. Allmyapps is a place where you can buy and sell applications (Windows only, as far as I can see), and it also seems that it can manage the installation process (for example, combining the installation of several apps into one, thus making system rebuilding very easy).
Check out their terms of service for developers here. As I can see, you can sign up for free, and keep 80% of sales revenues.
This question should be moved to Programmers.SE, but the only PC "app store" I'm aware of is Intel's AppUp.
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Does anyone have any ideas on measuring the popularity of an open source project? I thought it would be interesting to create a tools which would compare the popularity of similar open source projects.
The first metric that came to mind was to compare the number of Google results for each specific software, but it seems difficult to programmatically obtain this number (other than scraping it from the direct search page - this also runs into legal issues with Google I believe).
Any other metric ideas? I'd like the end product to be a tool, so metrics which are able to be accessed through code would be preferred.
Thanks,
Chris
If the projects are hosted by platforms like Sourceforge or Github, you can access the number of downloads...
SourceForge offer download statistics;
http://sourceforge.net/project/stats/detail.php?group_id=263007&ugn=dvwa&mode=week&type=prdownload
Google Code have activity ratings.
Maybe you could use those?