The 7th edition of the Publication Manual of the American Psychological Association has changed the format for some citations, revamped the look of student papers and added a section on bias free and gender neutral language. Consult the APA Style Blog for more detailed information.
MyBib: Free. Saves your projects on site. Can copy and paste into Word or save as a separate Word document. Can also upload into Zotero, BibTex, or Mendely. Or you can share via a link or email.
Opendemia: Free. (For $10/year you can use it without ads.) Can use it to take notes as well as create citations, which you can then copy and paste into your paper.
Mendeley Cite: Free plug-in for Microsoft Word that lets you cite sources without leaving your document. The plug-in appears in the references tab in Word which allows you to automatically add in-text citations and generate bibliographies. Compatible with Office 365, the latest versions of Word including the Word app for iPad.
Zotero: Free. Downloadable desktop app. Lets you collect research material, organize them, and create references and bibliographies.
EndNote: One time purchase of $115 for student license or $250 for a full license. (Can also be purchased for a group or an institution.) EndNote offers reference management software that allows users to Insert in-text citations while simultaneously creating a bibliography in Word as well as other features.
Paperpile: Subscription-based ($2.99/month academic) reference management system that lets you store, organize, and share your research all from one place. The paid version includes beta version of Word plug-ins for Mac and Windows. Also offers a free reference manager for Google Docs.
Citation Machine: Free online citation generator. Completed citations are added to your online bibliography, which you can then copy and paste to a document or export to Word. However, in order to save a bibliography, you need to upgrade to Citation Machine Plus ($9.95/month). The free version also requires that users watch an ad after every 48 hours to continue citing material.
CiteFast: Free. Easily copy and paste your citations or export.