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the starter edition lacks some nice features, and who promises that version 3.0 will also be free?
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The started version only blocks some of the nice things when the project grows over a limit (which is not that high, but enough to make reasonably sized sub-modules).
You may be right and version 3 may turn out to be no longer free. I'll just take my chances.
One thing also in favour of Sigasi HDT is that it runs on Eclipse, which is also used for the NIOS II IDE.
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please direct me to an open source FPGA project so I might consider leaving Altera.
I'm not an open source fanatic (as I said, I used to MS environment) , but when I have a choice between 2 smiler option, I'll take the always evolving, constantly reviewed, with cool features from actual users option.
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You will always need the proprietary vendor software to place and route.
I've always searched for and visited 'open source' FPGA projects and I have seen them all grind to a halt. As soon as the 'founder' gets a decent job (at Altera? :) ) the evolution stops ...