Cardhop - The Mac contacts app you'll want to use.

Bookamat - Powering the world's best independent fitness, Pilates and yoga studios.

The Contact Guru - Managing your contact list so you don't have to

appointman - Online booking solution for gyms and studios

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.

Presence AI - Presence AI enables your customers to BOOK business services by TEXT MESSAGE over your landline. AI-powered appointment booking, confirmations, & more.