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You can go for Microsoft Office Visio (not free, but very good and has Word integration which is very useful), Dia (free), VP-UML (free) or go for an online tool like http://yuml.me/ |
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The best (though not free) is Microsoft Visio There is a list of free alternatives that may help you if you don't want to fork down money. http://alternativeto.net/software/microsoft-visio/ |
