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Oracle:
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#RUS
Игорь Усольцев --- https://iusoltsev.wordpress.com/
Александр Рындин --- http://oraclegis.com/blog/
Дмитрий Волков --- http://dsvolk.blogspot.com/
Игорь Мельников --- http://www.igormelnikov.com/
Интернет-журнал «FORS» --- http://www.fors.ru/pressroom/journal/
Саян Малакшинов --- http://www.xt-r.com/
Юрий Пудовченко --- http://exadata-dba.blogspot.com/
SQL.RU --- https://www.sql.ru/forum/oracle
#World
Tanel Poder --- https://blog.tanelpoder.com/
Eerman arslan --- http://ermanarslan.blogspot.com/
Vitaliy Mogilevskiy --- http://www.dbatoolz.com/
Christian Antognini --- https://antognini.ch/blog
Diana Robete --- http://dbaparadise.com/
Jonathan Lewis --- https://jonathanlewis.wordpress.com/
ASM Support Guy --- http://asmsupportguy.blogspot.com/
Savvinov --- https://savvinov.com/
SQL Maria --- https://sqlmaria.com/
Andrey S. Nikolaev --- https://andreynikolaev.wordpress.com/
Dion Cho --- https://dioncho.wordpress.com/
Dominic Brooks --- https://orastory.wordpress.com/
Franck Pachot --- https://medium.com/@FranckPachot
Kerry Osborne --- http://kerryosborne.oracle-guy.com/
Kevin Closson --- https://kevinclosson.net/
Luca Canali --- https://externaltable.blogspot.com/
Optimizer Group blog --- https://blogs.oracle.com/optimizer/
Randolf Geist --- https://oracle-randolf.blogspot.com/
Riyaj Shamsudeen --- https://orainternals.wordpress.com/
Sayan Malakshinov --- http://orasql.org/
Surachart Opun --- https://surachart.blogspot.com/
Timur Akhmadeev --- https://timurakhmadeev.wordpress.com/
Wim Coekaerts --- https://blogs.oracle.com/wim/
#Exadata
https://unknowndba.blogspot.com/
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Interesting:
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Uber Engineering --- https://eng.uber.com/
Uber Engineering Database --- https://eng.uber.com/tag/database/
Netflix Tech blog --- https://medium.com/netflix-techblog
Google AI blog --- https://ai.googleblog.com/
Google Developers --- https://developers.googleblog.com/
Yandex Технологии --- https://yandex.ru/blog/yatechnologies
Yandex Dev --- https://yandex.ru/dev/
Airbnb Engineering --- https://medium.com/airbnb-engineering
Airbnb Eng & DS --- https://airbnb.io/