Pendragon — Data collection company with custom data collection tools for iOS and Android. Oriented more towards the enterprise market.
POIMapper — iOS and Android, fairly straightforward but focused on maps (POI is Point of Interest).
Qualtrics — Enterprise analytics firm – works in many sectors and known for industry-standard survey, employee engagement, analytics tools.
Riwi — Global survey platform — oriented towards organizations looking for large samples of pseudo random users.
SMAP — Australia-based consulting group with data collection platform and server.
Survey Monkey — One of the earlier and larger browser-based survey tools — many various features and pricing levels.
Telerivet — Global messaging platform oriented towards SMS communications.
TextIt — SMS messaging platform with interesting built-in flow controls for more natural 2-way communications.
Typeform — Web-based platform for forms. Can also be integrated into other platforms.