Handy Hint - Trove
This tip may or may not be useful to you, depending on what tools your University is providing for you. It has been a boon to me a number of times...
Not all Citation tools bring back the correct referencing details for your resource. Trove is a website connected with the National Library of Australia and is well worth visiting for a lot of reasons. If you search for an item in their catalogue, and view the catalogue record it will give you all the bibliographic information. Even better, it has a very helpful "cite this" button which gives a citation in several styles. Even if the style is not the one you want, the bibliographic information is likely to be accurate. I tested this with a particular resource. I tried it on several referencing tools and found Trove to be more accurate than Cite this for me, for example.
If in doubt about referencing or citing, find a helpful librarian.
Curation/Book Marking Tools (Mostly free)
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Diigo
This is one of the more well-known curation and bookmarking tools. It has an extension you can add to your browser to make curating items really easy. Unfortunately the free version has limits - but at least it will give you a trial of what it can do.
Click on the Link below to access 
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Evernote
This product is designed for note taking and organising as well as managing tasks. You can create notebooks, tag information and annotate. The free version has some limits but will give you a taste of the product.
Click on the LInk below to access
Referencing Tools (Mostly free)
EndNote
Endnote is not just a citation tool. It provides access to online resources and allows you to curate, annotate and cite/reference your information sources. The free version allows a taste of what EndNote offers. Your University may provide free access to this product.
Click on the Link below to access
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Mendeley
This is a free reference manager and 'academic social network'. It is a bit more rigorous than websites like Cite this for me as it is aimed at professional researchers as well as students.
Click on the Link below to access
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Zotero
This is a similar tool to Mendeley but has an (arguably) easier interface. It is a curation and citation tool so you can collect information, organise it and reference/cite the information.
Click on the Link below for access
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Cite this for me
Easy to use Referencing tool which covers a number of different styles. You can search for the item you wish to reference through this website and it will fill in the bibliographic details - be aware, though, it doesn't always find the correct information (See Handy Hint box for a bit of a solution to this problem)
Click on the Link below to access
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EasyBib
Another referencing tool which has limited free version accessibility. If you are prepared to pay for a package it provides multiple referencing styles and a plagiarism checker.
Click on the Link below to access
