По запросу: "checklist document file extension" найдено 144 иконки.

Extension
cloud Created with Sketch Beta.
generate-pdf
Clarity Icon This is shape (source) for Clarity vector icon theme for gtk Clarity Icon This is shape (source) for Clarity vector icon theme for gtk Jakub Jankiewicz Jakub Jankiewicz 2010 image/svg+xml
Clarity Icon This is shape (source) for Clarity vector icon theme for gtk Clarity Icon This is shape (source) for Clarity vector icon theme for gtk Jakub Jankiewicz Jakub Jankiewicz 2010 image/svg+xml
Folder Ubuntu Icon This is shape (source) for Clarity vector icon theme for gtk Folder Ubuntu Icon This is shape (source) for Clarity vector icon theme for gtk Jakub Jankiewicz Jakub Jankiewicz 2010 image/svg+xml
dropbox
https://www.svgrepo.com/show/474929/opened-folder.svg
document-success
171
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progressive-webapps/apis/web-app-manifest Created with Sketch.
Gala icon set image/svg+xml Gala icon set https://github.com/sisyphusion/gala-icons Jake Wells
file_css [#1742] Created with Sketch.