I am looking for a Windows SIP client/softphone that is capable of saving notes per number and bringing up saved notes whenever said number calls again.
Any ideas?
My tSIP has option to save text with contact and bring it on incoming and/or outgoing call or manually if you configure "Contact note" button. Local and global hotkeys can be assigned to buttons, so it might be semi-convenient. Personally I would prefer opening note on request than automatically.
It is very, very basic though - just text in ugly window. If you have any kind of CRM software or dedicated software for taking notes that can be interfaced with e.g. command line, opening page in a browser or sending HTTP request it probably could be way more convenient and powerful. tSIP has a dozen of scripting events and configurable buttons to which scripts can be assigned, using e.g. ShellExecute() function.