Google Trends
Google Trends shows how the search interest for a term varies over time and by region, together with related queries
Search
Search engines and search tools, from the most famous ones to very specialized. Note that searches for standards and regulations have their dedicated Standards category and are therefore not included here.
The category lists specialized search engines, scientific paper and preprint search, patent search and clinical trial search. Reverse image search, free image search engines, material, chemical and electronic component databases and web archives cover other kinds of content. Darknet search engines, blockchain explorers, IoT device search, FTP file search and plagiarism checkers complete it.
ThrustCurve Rocket Motor Database
ThrustCurve.org is a unique database of model and high-power rocket motors with performance data and thrust curve files. Motors can
NASA Astrophysics Data System (ADS)
The NASA Astrophysics Data System is a search engine for literature in astronomy, astrophysics, physics and space science. It returns
Semantic Scholar Papers Search
Semantic Scholar is a free search engine for scientific literature, run by the Allen Institute for AI (Ai2). It indexes
arXiv Preprints Archive
arXiv is the open access archive of about 2.4 million preprints in physics, mathematics, computer science, quantitative biology, quantitative finance,
NIST Chemistry WebBook
The NIST Chemistry WebBook is the online reference of NIST Standard Reference Database 69. It provides thermochemical, thermophysical and ion
Wikipedia Perennial Sources List (WP:RSP)
The Wikipedia Perennial Sources page is a dynamic index that documents community consensus on the reliability of frequently cited news
Problematic Paper Screener (PPS)
The Problematic Paper Screener (PPS) tool runs automated “fingerprint-queries” against the Dimensions.ai academic search engine, hunting for textual or structural
Abbott Aerospace Technical Library
The Abbott Aerospace Technical Library provides a centralized repository of over 17,000 technical documents and computational tools for aerospace structural
Onion Search Engine
Onion Search Engine is a discovery tool designed to index and retrieve content from the Tor network, specifically targeting .onion