
Postalytics
Lob
AmazingMail
PostGrid
Growmail Automated Direct Mail
GhostMail
If No Reply
PoliteMail
kdiff3
Beyond Compare
WinMerge
Meld
Araxis Merge
DiffMerge
P4Merge
Devart Code Compare
Postalytics
kdiff3Lob - A simple API to integrate print & mail solutions into your applications.
Beyond Compare - Beyond Compare allows you to compare files and folders.
AmazingMail - Business print-mail solution
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
PostGrid - Transform your Offline Communications. Use our fully-documented REST API to send personalized letters, checks, postcards and improve address accuracy.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.