My personal knowledge base is mostly in Evernote. Things like documents(pdf,word) are sitting in Dropbox. Have not been able to find something that consolidate

My personal knowledge base is mostly in Evernote. Things like documents(pdf,word) are sitting in Dropbox. Have not been able to find something that consolidated everything. I have a system which has been discussed at: https://news.ycombinator.com/item?id=16596569 https://news.ycombinator.com/item?id=16596569 Currently looking for tips on research paper highlighting, notes and reference management.