Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.

Sandboxie - Sandboxie is a program for Windows that is designed to allow the user to isolate individual programs on the hard drive.

FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts

Cameyo - Cameyo is a software program that can turn another piece of software into a portable app. This allows individuals to use a browser to run programs on a Windows system without installation.

Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.

Deep Freeze - DESCRIBING DEEPFREEZE SOFTWARE Deepfreeze, by Faronics, is an application that solves a unique problem that many companies have these days; it prevents an end user from making permanent changes to important system/administrative files.