Where do you keep ideas?

How is the idea born? No matter. It is important - how not to lose it, develop it, attract like-minded people and maybe turn it into a product.

There is an interest, an idea is being whipped, then it acquires links, names, articles, pictures, dates, other materials.

All this is necessary somewhere to store and put in the correct order, to mark in relation to the tasks - think over, study, make, contact, discuss ...
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Nokia uses the Ideas Project , which allows people to conduct a group summary.

What software do you use for your notes?