3 answers
If you are looking for advanced email to lead conversion app which does following1. Configure data elements for parsing using simple configuration page (instead of coding)2. Support multiple email templates/formats3. Set default values to lead fields (e.g. for record type, Lead source, Campaign)4. Attach lead to a campaign5. Process attachments6. Simulate parsing of text to Lead (Built in simulator)7. Extensive Error/Warning reportingThen try Email2LeadPro AppExchange package: https://appexchange.salesforce.com/listingDetail?listingId=a0N3A00000EFoGaUALMore details at: http://www.cloudgofer.com/email2lead/