I voted to close this question as it appears to be unavailable for currently supported releases and therefor unlikely to be of use. It has no upvoted/accepted answers. I also stumbled across this one which appears to have been useful for a period of time but doesn't appear to be useful now. I also found this big list question and did some random spot checking and couldn't find any of these projects currently in development/available for currently supported versions. I'm wondering at what point historical value outweighs usefulness to future users or if indeed it ever does? Should we VTC all or some of these and what criteria is most logical to use?
My opinion is dupe How to launch ask ubuntu lens? as a dupe of How do I install the Ask Ubuntu Unity Lens, and how do I use it? The second one is still valid as 12.04 is still supported and usually we don't close questions because they are not relevant anymore.
The big list one should just be left alone and I don't think the others a quite duplicates of that one and again 12.04 is still supported.
Here is a meta SE post about closing old question here How should Ask Ubuntu handle old questions and answers?