If you are just starting out, you might look into (free) or FlexiSign (the modern successor to Casmate). However, for those with a "if it ain't broke, don't fix it" mentality, Casmate Pro 6.52 on Windows 7 remains a top-tier production environment.
: Casmate was produced by Scanvec (now part of SAi/Flexi) and is no longer officially supported. i download casmate pro 652 windows 7 top