Of course we all go through different phases in what we are doing research-wise and so priorities and lists will change. But this is my top ten (well, OK, I snuck in a couple of extras…...) that I used in the past week.
Please do contribute your own top 10 in the comments section here or with a link to elsewhere. You should have used them in the past week, consider them must-have and they should be predominantly used for research. (And, apologies, the table is an image, so the links are non-clickable.)