PostGrid has been great for automating our insurance mails for our client
Postalytics - Automated direct mail software that’s faster, smarter & better. Postalytics sends personalized direct mail from your CRM and analyzes delivery & response.
Postacard - Text a photo to send it as a postcard for $3.
Lob - A simple API to integrate print & mail solutions into your applications.
Felt for iPhone - Handwritten cards for the modern world
AmazingMail - Business print-mail solution
NanaGram - Text your photos and we'll mail 4x6 prints to your Nana.