APA is the citation style that is being use the most often within my classes as such having access to it is necessary. On top of that APA is a welcome breath of fresh air due to how simple citing is with it compared to MLA.
Purdue Owl
Purdue Owl also helps with keeping track of APA citations. More importantly though Purdue Owl also contains information about other citation styles that I might need for assignments.
RefWorks
Refworks is a system used by the UNT Library that saves articles to be accessed at a later time without having to search for them again. This has been useful to me since it allows for me to not have to download all of the articles at once or leave them open in tabs in my browser.
Refworks citation manager
The Refworks citation manager automatically creates a works cited page for the articles entered for a number of styles. The work of making works cited pages is always the most mindless part of writing papers having something to automate it saves me time and lets me focus more on the quality of the paper.
HTML + CSS
HTML+CSS is a textbook covering how to use HTML and CSS. I took the web design class since my knowledge of computers is woefully incomplete and while I have come out of the class knowing how to use those systems they are still useful as something to refer to.
OCLC Bibliographic Formats and Standards
The amount of information in cataloging makes it hard to keep track of what fields are entered how. The OCLC helps by providing the information for bibliographic fields along with examples of how the information is put in.
MARC 21 Format for Bibliographic Data
The amount of information in cataloging makes it hard to keep track of what fields are entered how. The MARC 21 Bibliographic Data helps by explaining what the meaning of the entries into the fields are.
MARC 21 Format for Authority Data
The amount of information in cataloging makes it hard to keep track of what fields are entered how. The MARC 21 Authority Data helps by explaining what the meaning of the entries into the fields are.
Library of Congress Authority Records
The Library of Congress Authority Records holds a list of authority records that can be referred to when creating new records.
DC Terms
DC Terms provides a list of the terms and elements used by Dublin Core along with an explanation on how to enter the information into them and examples of what correct entries look like.
Thesaurus of Geographic Names
The Thesaurus of Geographic Names is a database filled with contributed terms relating to geographic locations that can be used when creating HTML or XML records
Library of Congress Subject headings
The Library of Congress Subject Heading holds a controlled list of subject terms to use when cataloging items.
Art and Architecture Thesaurus
The AAT has a database filled with contributed terms relating to fields of art and architecture that can be used when creating HTML or XML records.
DCMI
The Dublin Core Metadata Index has the rules and terms for creating records with Dublin Core
Sublime Text
Sublime Text is a very useful and free text editor that helps with creating records for databases.