Kesava Mandiga- Curious cat. Writer. Explorer.Clearbit for me. I used Rapportive for a while before LinkedIn acquired it. Since then, I've been using Clearbit and have no complaints.
Ben Lang- SpokeI generally use Clearbit's gmail plugin to find emails. The best part is you can look up a domain and see the most popular contacts on the domain, so it's a great way to find out who to email also.
TechCrunchLinkedIn's acquisition of the popular email add-in Rapportive, and its subsequent demolition as its new owner ripped out some of its best features, left a lot of users angry and scrambling for an alternative. A number of these have since launched, but a newcomer called Connect arriving today from Clearbit may be one of the best to hit the market yet.