3
The Document Foundation
11
Calc is the free spreadsheet program you've always needed.
3
LibreOffice
8
Freeware
Create complete books with contents, diagrams, indexes, and more.
33,434
Adobe Systems Incorporated
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Freeware
Adds annotations to documents using a complete set of commenting features.
103
Investintech.com Inc.
26,897
Shareware
Convert, generate, modify, and sign PDF documents.
3
JabRef Team
4,552
Open source
Manage the list of references for your research papers in proper formatting.
1,901
Centre for Development of Advanced Computing
34,741
ISM Office is the perfect multilingual office automation solution.