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Are there any general internet search engines that can limit hits to exclusively free non-commercial websites? (No '.com's or '.biz's, no paywalls, no membership-based revenue models, etc.)

So, for example, a search for "foobar" would show results from Wikipedia, Project Gutenburg, and '.gov' sites, but not from Twitter, Facebook, Amazon, etc. The results of a search should not include SEO garbage.

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    I begin to develop Kristinita's Search, largely like your requirements. See description of search engine. But it's only for Russian-languages sites. Thanks. – Саша Черных Jan 3 '17 at 12:06
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    @СашаЧерных, Thanks, just was testing it. While I'd prefer something that's more linguistically general, KS is still quite useful under Chromium with auto-translate on. Please repost your comment as an answer. – agc Jan 3 '17 at 16:55
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+50

1. Briefly about Kristinita'S Search

I have long been worried about the problem, which raised in @agc question. Recently I begin to develop Kristinita's Search — search engine, which searches for information only in open access sources, written by professionals in the theme.

I do not find choice except to add each website, which will be searched, manually. In my search engine not paywalls, internet-magazines, social networks, SEO garbage and so on. I add only sites, useful for science.


2. Limits

  1. I'm sorry, the project not ready yet. Please, do not hit me hard.
  2. Kristinita's search only for Runet. I understand, that more be better to create search engine that include English and more languages, but I can not to do a huge amount of work.

About others limits and shortcomings see in this section.


3. Examples

1. The construction term:

  • Google: 7 sites to sell products, 1 forum thread, images and 1 science article.

Google construction 1

Google construction 2

  • Kristinita's Search: 10 science articles.

Kris construction 1

Kris construction 2

Kristinita's Search not include commercial, non-science sites.

2. The chemical term

  • CyberLeninka — 2 articles about BeO (only about toxical properties) and 9 casual mentions in the text.

Cyber BeO 1

Cyber BeO 2

Cyber BeO 3

Cyber BeO 4

  • Kristinita's Search — 9 chemical articles about BeO, 1 casual mention.

Kris BeO 1

Kris BeO 2

Kristinita's Search was included more materials and have more relevance search result than CyberLeninka, Google Scholar, Google Academy, eLIBRARY and others science search engine in Russian language.

3. Aquarium fish

  • Yandex: 9 amateur sites, images and Wikipedia.

Yandex Gurami 1

Yandex Gurami 2

  • Kristinita's Search: 10 articles in professional journals for the aquarists.

Kris Gurami 1

Kris Gurami 2

Kristinita's Search included only materials written by professionals, not amateurs.

4. President of Russian Federation

  • Yandex: Official site, Wikipedia, 2 news feed, 3 profiles in social networks, 2 sites of non-professional authors, 2 mass media sites

Yandex Putin 1

Yandex Putin 2

  • Kristinita's Search: 6 biographies in mass-media, 3 biographies in wiki-sites, 1 biography of person bearing the same surname.

Kris Putin 1

Kris Putin 2

Kristinita's Search is encyclopedia and not included news and social networks.


4. Additional links

Materials from links in Russian language.

If you want to make similar search system, you may write me according to any of the contacts — I try to help you. Also, I will not refuse, if someone offer me any help.

Thanks.

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    Here is a Mycroft search engine plugin for Kristinita's Search. – agc Jan 8 '17 at 11:54
  • @agc, I add opensearch.xml for Kristinita's Search, I planned to add Kristinita's Search in Mycroft, also, in Bang, Qwant and so on. But first I must at least to work at design of Kristinita's Search documentation :) . But thank you very much! – Саша Черных Jan 8 '17 at 18:52
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    Update: unfortunately a check on 5/23/19 shows that Kristinita's Search currently links to some sort of pornography site. – agc May 23 at 13:24
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    Glad to help, if at all possible. Clicking on https://kristinita.ru/ goes to a "Gif Porn Tube" page. The bottom of the page has the text: "DMCA 2257 Contact Us © Copyright 2019 kristinita.ru - All rights reserved." – agc May 24 at 8:47
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    Using the new Nelify address, I've updated the Mycroft plugin for Kristinita's Search. – agc May 26 at 16:52

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