Qiqqa

Probably Mendeley and EndNote are the most popular reference manager so far. I don't think many people ever heard of qiqqa.

qiqqa is an awesome reference manager [RM]. The most important features of this RM are:
Integration with MS Word for ref. citation.

• Easy to find missing reference with BibTeX Sniffer
• Related articles recommendation
• Tagging
• Annotation
• Annotation report
• and many more

Here, I want to share an easy way to cite reference in your paper.

• Press "Add citation" button. You can do this on a single pdf or multiple pdf. This button will insert citation-cluster (unformatted reference style) and merely indicate that there will be a citation there.
• Add "My Bibliography Section" text at the reference section in your paper. This will alert qiqqa to insert bibliography here later.
• Press "Add bibliography" button
• Select your preferred CSL style (in my case: IEEE)
• Click the magic wand "Reformat all citations"
• DONE!!!

More on qiqqa functions and features can be found on  qiqqa manual.