DocumentServer
ONLYOFFICE Docs is a free collaborative online office suite comprising viewers and editors for texts, spreadsheets and presentations, forms and PDF, fully compatible with Office Open XML formats: .docx, .xlsx, .pptx and enabling collaborative editing in real time.
Open Source Alternative to:
Similar projects
More open source repositories worth checking out.
build-your-own-x
Open to contributorsOpen
Master programming by recreating your favorite technologies from scratch.
21/02/2026
47,891
504,871
awesome
Open to contributorsOpen
😎 Awesome lists about all kinds of interesting topics
05/05/2026
35,174
470,237
freeCodeCamp
Open to contributorsOpen
freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.
26/05/2026
44,699
445,415
public-apis
Open to contributorsOpen
A collective list of free APIs
26/05/2026
47,935
437,273