robots.txt Tester
Not rocket science, but simple and efficient.Just provide your main site URL, and it will get the corresponding live robots.txt file and analyse it for you, and tell you:if any unknown rule foundif any contradiction between the rules foundor unclear rule foundThe big plus: you can do the test by simulating either Googlebot, Bingbot, Yandex, […]
Security Headers Tester
Just provide any URL or domain and it will analyse the headers served by the given page. Among many header tested: HTTP Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, Cross-Origin-Opener-Policy (COOP), Cross-Origin-Resource-Policy (CORP), Set-Cookie, Access-Control-Allow-Origine …Very complete and useful forSite owners: to check their setup and how their site is viewed by browsers, crawler, bots, so as customer (and […]
Site Requests Map Generator
Provide any site or url of a page, and the tool will map all other sites, url, IP or remote services that the page is calling on the front-end, in other words, informing them of your request.As most of the sites may serve you a different content based on your location (different language, but not […]
ChemSpider Chemistry Database
109+ million of chemical structures.Free chemical structure database providing fast text and structured search.Search by chemical name, brand, or other parameters, to find literature references, physical properties, spectra, suppliers.
Google Scholar
Gives access to online education and research articles.Several languages and automatic translation also.Note: not everything is 100% free, but at least some abstract.
EThOS UK Theses Search
Search over the 500k UK theses from over 120 UK institutions: the Electronic Theses Online Service (EThOS), operated by the British Library, is the centralized national repository for UK doctoral theses. It aggregates metadata for over 600,000 PhD records from more than 140 higher education institutions, providing a single point of discovery for research dating […]
CORE Research Papers Search
“The world’s largest collection of open access research papers” we could not describe better.207+ million of them.Sortable by language and other criteria. You’ll get a pdf of the original source, either an abstract or full text.Provides also an API to conduct any automatic search or statistics over any of your topics.
WorldWideScience Research Gateway
Aggregates 200 international research institutions and permits a centralized search on their research articles and databases. If you must start somewhere, start here!Edit: site is currently down. Vote wisely …An institution by institution filter is provided, so as an automatic translation. Again, a must.Tip: the link above is the advanced search. Go to the home […]
ProQuest Publications Search
Search millions of worldwide research publications. Integral or abstract view, up to the last 10 years, from 9000+ publishers.Free search for a couple of publications, free account for more.
Electropedia Electrotechnical Vocabulary
Maintained by the International Electrotechnical Commission (aka IEC), Electropedia provides all the terms and definitions used for the electricity and electronic fields, in 11 languages, used in international standards.Electropedia, maintained by the International Electrotechnical Commission (IEC), is the definitive online database for electrotechnical terminology, formally known as the International Electrotechnical Vocabulary (IEV). It provides a […]