I've used a few—though only Clearbit extensively.
Clearbit's Gmail addon is generally a great way to find people's email addresses, either to reach out to a specific person at a company or to find who's in a role at a company. And then, in the same way, their API can fill in that detail for you, which I've used to see subscribers' roles and companies, among other things.
Diffbot has a contact enrichment tool that's based on data they've crawled from public websites. It works through its API, website, or an Excel/Google Sheets' add-on—the latter being an easy way to enrich data.
FullContact is an app I'd originally used more for its business card scanner app—but one of its core things now is an API to enrich contact data.
And, as one more I just realized, Zapier's Lead Score tool is white-labeled MadKudu, so there's another I've used in passing!
My company is looking to switch platforms for our customer-facing documentation of our SDK. We currently use a mix of Confluence and isolated PDF's, but we are looking for something a little more p...
Curious if anyone has any new, favorite survey tools? Are you mainly using Survey Monkey, Typeform and Google Forms?
I recently added 1Password and Backblaze to my "home stack" to coordinate thing within my family. In addition, I use: 1Password - So my wife and I can share passwords Backblaze - Automated ackups...