by Lisa A. Grimaldi | April 05, 2013

map screen shotPerfect for traveling abroad or in areas with poor reception, the Avenza PDF Maps app lets users navigate GPS-enabled maps without network access or data roaming charges. Available for Apple and Android devices. The app and most maps are free. Bonus: The app allows planners to add their own customized maps for attendees to download at no cost. (416) 487-5116;