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I heard that lately a patent for LEGO expired and now everyone can create a company to produce bricks that are compatible with LEGO.

I am wondering how many of such companies are there.

I know one from my country, Cobi. Can you point me another alternatives?

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closed as not constructive by Shog9 Nov 20 '11 at 4:14

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

This should really be broken up into questions along the lines of "Is X compatible with Lego?" or "Can I make X compatible with Lego?" Otherwise we will get each answer containing overlapping subsets, and we'll likely miss good advice on specific adapters or techniques. In general, we should not be seeking CW questions or answers at this point in the site's lifetime. – user23 Oct 27 '11 at 9:12
There are many different patents. The ones for the original bricks expired long ago, as patents expire after 20 years. – starblue Oct 27 '11 at 12:14
I agree with Joe; there's no one set of correct answers. It's a wiki-type question, and is too early for this site. – Grandpappy Oct 27 '11 at 13:33
This other SE question is relevant to the patent part : "Are companies producing custom molded LEGO pieces legally entitled to do so?" :… – jfyelle Oct 27 '11 at 15:38
I think Joe's got the right idea... As appealing as One Big List might seem, questions on individual products are probably a lot more useful to folks researching the products available to them. – Shog9 Nov 20 '11 at 4:15

there are at least:

Note that some of this only produce custom accessories for minifigs, very small sets or exact copies of the official sets, no own really "big" sets like LEGO does

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While others may disagree with me, this would be better places as a Community Wiki answer, allowing others to update it as well ;) – Zhaph - Ben Duguid Oct 27 '11 at 15:03
sorry for reading over your commet, zaph. this should indeed be community wiki - and now it is. – oezi Mar 11 '12 at 9:04
These look like spam links. – hobs Apr 4 '14 at 20:37

Here are a few:

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Brickarms makes nice custom Lego-compatible weapons, accessories, and minifigures.

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