If you use Outlook at work (or probably “no matter what email and contact management system you use at work”) you can simply export the information to a spreadsheet or database or webmail system’s contact management software.

I use Outlook at work and – though I don’t need to worry about any long-term career contacts going forward – I do use gSyncIt to synchronize my Outlook calendar with my Google calendar. I could do the same with contacts, but I choose not to.

There are a lot of online CRM (Customer Relationship Management) systems that would be completely portable and most have easy imports in a variety of formats. Many single user accounts are free as well.

There’s so many of them it’s probably worth trying a couple to see what you like, it really just depends on how you want to use them.

You could also do something simple like a gmail account and google contacts or a note taking app that has OCR for business cards (Evernote is an example)... but the CRM would basically be custom made for what you’re doing.