These organizations contain basic useful background information and resources about linguistics. Visit them if you are developing a greater understanding of the field and/or considering going into it yourself.
Many corpora are available online, some free and some not. Below is a brief selection of English-language corpora. To find more corpora, try starting with the Registry of Research Data Repositories (re3data.org).
This is a selection of tools and collections of tools that may be useful for your work.