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Want to save or analyse all the tweets which used a particular hashtag? Enter a hashtag below to get a list of all the tweets which referenced it, to download as a CSV spreadsheet or share with friends or colleagues - great for post-event analysis. No logins or spam tweets involved, promise.

A fully-managed search service in the cloud that can be set up and running in less than 1 hour, with automatic scaling for data and traffic. M

Refinder. Search above the cloud. All your data from Dropbox, Google, Evernote, and more

"Our powerful, easy-to-use people search tools and technology enable fast access to comprehensive data including a person's phone numbers, emails, addresses, relatives, date of birth, education and employment."

NLMplus is an award winning Semantic Search Engine and Biomedical Knowledge Base application that showcases a variety of natural language processing tools to provide an improved level of access to the vast collection of biomedical data and services of the National Library of Medicine.

we build a web site or an application and want to add search to it, and then it hits us: getting search working is hard. We want our search solution to be fast, we want a painless setup and a completely free search schema, we want to be able to index data simply using JSON over HTTP, we want our search server to be always available, we want to be able to start with one machine and scale to hundreds, we want real-time search, we want simple multi-tenancy, and we want a solution that is built for the cloud.

Plexus Engine is an app and data platform that discovers emerging topical information. You can read more about it on CEO Marshall Kirkpatrick's personal blog.

craigslist data, better than craigslist!

Economics Search large range of economic information. Covers 40 years of historical data about the US economy.

"The search-result page is a collection of iframes showing the data from these search engines:"

harvesting and analyzing Big Data from the Deep Web

"We collect data from various sources on the web to give you high quality results."

OpenFTS (Open Source Full Text Search engine) is an advanced PostgreSQL-based search engine that provides online indexing of data and relevance ranking for database searching. Close integration with database allows use of metadata to restrict search results.

Find anything Your data is spread across the web. Search through it at once, just like you search your hard-drive. Get it anywhere - Greplin works with nearly every computer, browser and mobile device in the market. Search at lightning speed - Find things with amazingly fast, auto-completing intelligent search. Up to 1,000x faster than Gmail search.

novoseek is a biomedical search engine developed by bioalma for searching published knowledge in biomedical literature.novoseek indexes biomedical literature from Pubmed, Free Full Text Publications from Open Access Journals in PubMedCentral and US grants from over 75 institutions including the U.S. National Institute of Health (NIH), National Science Foundation, U.S. Department of Agriculture, and Center for Disease Control and Prevention (CDCP) using a text mining technology that enables the identification of key biomedical terms. To perform this ambiguous identification, our technology takes into account external available data as well as contextual term information.

Mashpedia is a web encyclopedia featuring real-time data and rich media content from a wide breadth of sources including the social web.

Jumper helps you find the best, most valuable, information fast. No more searching through countless distributed silos.Now you can find & share the best content, media, or data regardless of format or location in one search box. Our collaborativesearch engine uses peer and social-networking principles to make hard to find information more easily discoverable. If youhave complex search requirements Jumper delivers more focused information, faster, across the complete information landscape, inside and outside the firewall, based on your unique needs.

seekda™ is the free search engine for Web API (Web Services at the moment) and their providers. We run a focused crawled that gathers information about services available on the Web and we monitor these services daily. We also allow our users to edit certain data regarding providers or their services.