EndNote

EndNote is a very useful program that lets you: 1) Maintain a database of bibliographic information on books, articles, etc. 2) Store PDFs of articles in the database. 3) Cite your references in word processor such as Word, with automatic functionality to generate proper citation form where the text is cited, as well as generating a correspond list of references if called for by the style guide you are using.

Function 3) can be quite powerful, because you can reformat your citation and lists of references according to different style guides, simply by selecting different output styles in EndNote and regenerating the citations/references. The system of specifying styles is fairly powerful, and with tweaks, you can get it to work for humanities. One tweak you might need if you cite texts in other language is to turn off autocapitalization in the output style formatting, and manually editing titles to get the capitalization appropriate for languages such as French and English.

EndNote can import bibliographic information from many online indexing services and online journals, so it is very quick to get this information, together with abstracts, into EndNote. EndNote can also search within your library system for the full text PDFs of articles, using information such as the DOI. Results are quite variable, though, probably dependent on how permissions and other stuff is set up at your library.