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LeaksID
Enrich private docs with dynamic invisible anti-leak marks
极客公园说
2021-09-08
18160 view · 181 likes
PDF Annotator by Good Annotations
Draw on your pdf online
Elon Musk
2020-11-11
59360 view · 593 likes
Sourceful
A search engine for crowd-sourced public Google docs
少数派用户
2020-03-29
9860 view · 98 likes