[Update: Steve Dennis, a developer for Mendeley, posted a comment explaining a bit more about the data collection and privacy concerns some users have with Mendeley Desktop. It adds some pros and cons about the process outlined here.]
Two days ago (2013-04-08) Elsevier (the academic publishing company that is the subject of some controversy) bought Mendeley (the reference manager and a tool often mentioned when discussing 'open' research). The Mendeley Blog does a quick Q&A covering what changes will take place (they take the position that this will be better for everyone), while the folks over at The Chronicle examine the sale with a slightly more critical lens. Some accounts I follow on Twitter began using the hashtag #mendelete, taking an even more critical stance on the sale. (Someone has even made a guide to exporting data from and then deleting one's Mendeley account - useful, even if just for the exporting data portion.)
While it remains to be seen what changes will, in fact, take place, the simple fact remains that Mendeley is not open source and remains controlled by a company that does not have my (and your) best interests in mind. The most important thing for Elsevier is making money, and, for now, keeping Mendeley operating serves this goal. However, my work is too important to rely on a tool that somebody else controls. (I did a pretty thorough post on my views about this after the discontinuation of Google Reader.)
Now, Mendeley advertises itself as both a reference manager (think iTunes for PDFs) and a social network. This social network aspect has generated a lot of data, and many researchers seem to find it useful. Consequently, Mendeley has integrated their web services and their desktop client so that a single account is required to use both. Yes, an account is required to use the desktop software that would work perfectly well without an online account. Sure, it is enhanced by internet connectivity, but an internet connection is not required to organize my documents.
But, an account is not really required. With a teeny bit of work, the Mendeley desktop software can be configured to work without a Mendeley account. This solution comes from the Mendeley support website, and is used to help people launch Mendeley when there are issues with the software and/or accounts. It is a 'feature' for support, but is certainly not something they advertise. The trick is to add
--setting General_FirstRun:false (with two dashes, an underscore, and a colon) as an argument to the program when it launches. I'm doing this on Windows, but as Mendeley is cross-platform, it should ostensibly work on OS X and Linux, too. (Let me know in the comments if it does or doesn't work.)
To add this argument, right click the shortcut for Mendeley (e.g. the one on your desktop) and select properties. Then, add it to the box labeled "Target" outside of the quotation marks. Check out the image below.
After clicking Apply, you may need to grant Administrator approval for the changes to be saved, depending on your UAC settings. Adding this to the launcher skips the initial window that asks for your account information allowing you to use the offline features of Mendeley in peace. (You can add an account later by choosing "Tools" followed by "Options".)
Now, this option works with at least Mendeley Desktop 1.8.4, but there are no guarantees about 1.8.5 retaining this same feature. (Though there are many uses for this ability in a support context and removing it would be silly.) I feel somewhat assuaged knowing that I can use Mendeley on my computer whenever, wherever. Moreover, if I ever need to install Mendeley and their servers are unavailable, I can still use it.
I'm not Men-deleting my account. Not yet, at least. I'm still holding out hope that the program will be made open-source, assuaging even more of my concerns. There may still yet be hope according to something I saw from William Gunn, Mendeley's Head of Academic Outreach:
So, open source is still being talked about, and the API is remaining open. These are promising signs. For the meantime, at least, I'm going to check out using Zotero in addition to Mendeley. I've been hearing some good things about Zotero, and it never hurts to have options. As the saying goes, "Two is one, one is none."