Trello for Slack - Organize anything with anyone, inside Slack

TripIt - TripIt is a travel app that creates a master itinerary to organize all of your plans for your vacation or work trip in one spot.

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

Roadtrippers - The ultimate road trip planner to help you discover extraordinary places, book hotels, and share itineraries all from the map.

Halp - Slack-first ticketing for internal helpdesk

Sygic Travel Maps - Itinerary planner for independent travelers