Hello, I am cipher387 (aka 
I follow a Twitter account where I post various practical notes about OSINT, with occasional distractions from other cybersecurity and tech-related topics.
I collect all useful and interesting links from my tweets on a separate site.
404 tools for various OSINT-related tasks
Archive of tweets from my suspensed account (Osint Stuff @Ivan30394639) — https://t.me/cybdetectivearchive (Telegram Channel)
I am also on the sly developing my own services for OSINT. I have huge plans and projects, but so far I put only the simplest projects in the public domain.
Quick hashtags and keywords search (70 social media platform in one page)
Domain Investigation Toolbox Worldwide catalog of business registries
Google Custom Search engine for searching 48 pastebin sites
Google Custom Search engine for searching 20 source code hosting services
21 tools for searching cached and archived websites in one page
GREP FOR OSINT — set of very simple shell scripts that will help you quickly analyze a text or a folder with files for data useful for investigation (phone numbers, bank card numbers, URLs, emails and nicknames)
To be continued...