My company has automated checkwriting and checkprinting with PrintBoss for the last 2 years. We have had no issues and whenever we need assistance for any reason, their service people have been responsive and helpful. We would recommend PrintBoss.
Online Check Writer - Online Check Writer is an all-in-one financial service provider with all kinds of payment options to pay and get paid.
Wondershare PDFelement - All-in-one PDF editor
Checkeeper - *Have your own check stock? Awesome, Checkeeper will work with virtually any type!
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
CheckSoft - Check printing software
Foxit PhantomPDF - Edit PDF files with our feature-rich PDF Editor. Download Foxit PDF Editor to convert, sign, scan / OCR & more. A speedy PDF Editor alternative to Adobe Acrobat.