Zotero in the Archives
Excellent strategies and tips for using Zotero for organizing and citing archival material: Harvard's Using Zotero for Archival Research
Organizing archival research in general, including using a camera in the archives: Cornell's Tips & Strategies for Archival Research
Tips on citations for archival materials from the Zotero Forum
Tropy for Archival Research
Tropy is a new beta tool developed to work with images, particularly archival research photographs. Like Zotero, it's free and was developed at The Roy Rosenzweig Center for History and New Media at George Mason University. Tropy allows you to spend more time working with your research photos, particularly transcribing handwritten documents, and less time searching for them. Currently, unfortunately, there is no integration with Zotero.