One of the Chrome Extensions is the totally free
Assistlead, which can create Leads and Contacts in Salesforce from a LinkedIn Profile. While creating records using Assistlead works great, it can't edit existing records, nor can it create Salesforce Accounts.
Another Chrome Extension is
Salesbolt, which has both a free and paid version. As well as creating Leads and Contacts from Profiles, it also creates Salesforce Accounts. Salesbolt can further save you time by surfacing existing Salesforce data, so you don't accidentally create duplicate records. Salesbolt also works with custom fields and multiple page layouts, something the official app doesn't yet support.
Salesbolt works with the standard LinkedIn experience, as well as the paid LinkedIn editions such as LinkedIn Recruiter, Recruiter Lite and LinkedIn Sales Navigator.