As part of my PhD work, I use Mendeley and Zotero for reference management. But, both of the software has their own pros and cons. I'm looking for better software that is free/open-source, for my citation management.
Dear Renjith R. although both mendeley and zotero are not 100 perfect. You can still use them. I am not sure if there is any ref manager that is 100 perfect.
I recommend you to use EndNote, since this software is free, compatible with both windows and mac systems, free, very easy to use and you can create and customized library of all your references.
It does everything those two do as a citation manager, but it combines the automated organization and reference management aspect of the expensive guys.
Renjith R. Actually endnote has a free version called endnote basic, but it's offered through web of science and the experience is very laggy with a steep learning curve. Should also mention that it's cloud-native, but replete with bugs so the experience is inconsistent. It is powerful and (to my knowledge) has access to the most databases amongst the biggest reference managers.
I've just started trying out jabref and so far it seems to work well, but doesn't look as good as zotero. The big advantage is that you can use different accounts, which zotero doesn't really let you have on a desktop version.