There are dozens of dedicated reference management tools. The best known and most widely used are:
To help you choose the tool that best suits your needs, take a look at our comparison tables.
Whatever tool you choose, it is always relatively easy to switch at a later stage and import your references in another tool.
B) Getting some stuff in:
C) Organising, reading, annotating
Support from Zotero itself: https://www.zotero.org/support/
Reference management is the way you systematically collect, store, organize, annotate, share and cite sources. Those sources can have any form: articles, books, images, data, multimedia and more. You can collect and store the full text/files or just the bibliographic metadata (title, author, publication year etc.) describing these.
If you use a lot of sources and especially if you often write papers etc. citing these sources it is wise to use a tool that manages recurring tasks and thus makes your workflow easier and more reliable. A big time saver of those tools is the automatic generation of bibliographies with cited literature, in the citation style of your choice (APA, MLA, Nature, Vancouver and more). These tools are called reference managers or reference management tools. They come in many forms:
For more guidance on choosing a reference management tool, for a comparison chart of functionality and for a quick-start tutorial/training for Mendeley, RefWorks and Zotero visit the full Reference management LibGuide.