user12983: Is there database of orphaned blocks?
https://blockchain.info/orphaned-blocks does not work right now
Does anybody keep them?
Also I am looking for those transactions which were not included in blocks (non-standard, double-spends, not enough fees, etc)

user13163: In this: http://arxiv.org/pdf/1403.6676.pdf paper Christian Decker and Roger Wattenhofer describe their use of a system to monitor the bitcoin network for failed transactions.
Some tools are available on https://github.com/cdecker?tab=repositories .
Though not a database by itself, these tools might be useful for building such a database.

user12525: Do you need a user interface or to find them via API? We do not have UI at the moment for this (we will very soon) but you can definitely use our REST API to get them.
If the API is what you need then you can just use the following API call to filter ORPHANED blocks only. 

https://api.biteasy.com/blockchain/v1/blocks?type=ORPHANED

If the transactions weren't included in the main chain then they will either be DEAD or PENDING and you can fetch them with the following API call:

https://api.biteasy.com/blockchain/v1/transactions?confidence=DEAD

and 

https://api.biteasy.com/blockchain/v1/transactions?confidence=PENDING

Check out the link to our documentation and also you can use our testing tool which you can find here https://www.biteasy.com/developers/sandbox

12983: <p>Is there database of orphaned blocks?</p>

<p><a href="https://blockchain.info/orphaned-blocks" rel="nofollow">https://blockchain.info/orphaned-blocks</a> does not work right now</p>

<p>Does anybody keep them?</p>

<p>Also I am looking for those transactions which were not included in blocks (non-standard, double-spends, not enough fees, etc)</p>
 13163: <p>In this: <a href="http://arxiv.org/pdf/1403.6676.pdf" rel="nofollow">http://arxiv.org/pdf/1403.6676.pdf</a> paper Christian Decker and Roger Wattenhofer describe their use of a system to monitor the bitcoin network for failed transactions.</p>

<p>Some tools are available on <a href="https://github.com/cdecker?tab=repositories" rel="nofollow">https://github.com/cdecker?tab=repositories</a> .</p>

<p>Though not a database by itself, these tools might be useful for building such a database.</p>
 12525: <p>Do you need a user interface or to find them via API? We do not have UI at the moment for this (we will very soon) but you can definitely use our <a href="https://support.biteasy.com/kb/rest-api" rel="nofollow">REST API</a> to get them.</p>

<p>If the API is what you need then you can just use the following API call to filter ORPHANED blocks only. </p>

<blockquote>
  <p><a href="https://api.biteasy.com/blockchain/v1/blocks?type=ORPHANED" rel="nofollow">https://api.biteasy.com/blockchain/v1/blocks?type=ORPHANED</a></p>
</blockquote>

<p>If the transactions weren't included in the main chain then they will either be DEAD or PENDING and you can fetch them with the following API call:</p>

<blockquote>
  <p><a href="https://api.biteasy.com/blockchain/v1/transactions?confidence=DEAD" rel="nofollow">https://api.biteasy.com/blockchain/v1/transactions?confidence=DEAD</a></p>
</blockquote>

<p>and </p>

<blockquote>
  <p><a href="https://api.biteasy.com/blockchain/v1/transactions?confidence=PENDING" rel="nofollow">https://api.biteasy.com/blockchain/v1/transactions?confidence=PENDING</a></p>
</blockquote>

<p>Check out the link to our documentation and also you can use our testing tool which you can find here <a href="https://www.biteasy.com/developers/sandbox" rel="nofollow">https://www.biteasy.com/developers/sandbox</a></p>
