I use Popl for connecting with people at South by Southwest, and I appreciate how it keeps all my contacts and notes in one place. It's really easy for me to collect contact information and share mine with others I meet. I like the nice clean website it provides, even on a free account, because it makes it easy to look professional with my socials and contact information without having to make a whole site myself. Additionally, the initial setup was super easy and took me like five minutes tops.

Good CRM integration options, nice interface and setup, detailed customization options, strong campaign setup options.

Very useful, no need to carry around business cards