Can you advice me software to create flow-charts for program logic.
My problem is that I’ve created complicated algorithm with lots of if…else and I need to create flow-chart for all of that to avoid mistakes.
The example of what I want to have is this http://www.fceditor.ru/files/pic1.gif
But I don’t want it to create flow-chart from source code. I want to create it myself
or 
(source: analog.com)
Can you advice me software to create flow-charts for program logic. My problem is
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The classic answer to this is Microsoft Visio, but there also a number of free / open source options. The best of these is probably Dia.