Second, learn navigation (very high-quality self-study websites, foreign languages, office, mathematics and physics, including Khan Institute abroad).
Third, Kota Academic (academic resource navigation website)
Fourth, HiPPTer (PPT-based resource navigation website)
Five, seeseed (collecting materials+designer front-end developers)
Tom, dick and Harry, creator (Internet practitioner navigation, suitable for Internet front-end+product operation manager)
Addog (advertising marketing tool navigation, suitable for advertising practitioners and enthusiasts-has a real-time list of advertising hotspots and materials.
Website containing consulting, case studies, data and tools, marketing calendar)
199it (Internet data navigation) (free and paid)
Snowball navigation (financial navigation-investment-macro data, financial tools, etc. )
Anti-counterfeiting navigation (navigation websites of all departments in China)
Sogou Website Navigation-Local Department Navigation (Local Department Information)
Start (material retrieval)
Insect tribe (general search website)