Research Portal
- SCIe — Science Citation Index Expanded
- MathSciNet — AMS reference database
- arXiv — Online e-prints archive
- CiteSeerX — PSU citation database for CS and IT
- OnePetro — Online library serving E&P industry
- Google Scholar — Google scholar search engine
- Mendeley — Free online reference manager
- NSFC — China National Science Foundation
- National Science Library — Library of Chinese Academy of Sciences
- ScienceDirect — Elsevier Science Direct
Programming and More
- BitBucket — BitBucket HG and Git Service
- GitHub — Git Hub
- SourceForge — Open-source software center