There’s a number of fine mobile location aware mapping and “Geo” apps available for the hardcore, mobile Geo enthusiast and GeoGeek… I’ve plugged a number of these apps over the years and here’s a reminder of just a few of the fine apps available for you iOS fans. 

And so, 10+1 GIS and Mapping apps for the iPhone:

1. Avenza PDF Maps App for Apple iOS – Geospatial PDF reader for iPhone, iPad and iPod Touch. PDF Maps is the first application of its kind designed specifically for using geographically-aware PDF files on portable devices and opens the door to allowing any map to be GPS-aware.
2. Esri ArcGIS for iOS app – The app lets users collect, edit, and update features and attribute information while performing field data collection and inspection. To download or get more information about ArcGIS API for iOS, visit the ArcGIS Resource Center
   
3. AutoCAD WS – think Autodesk on your iPhone… enable AutoCAD users to edit and share AutoCAD files on iPad, iPhone and iPod touch so they can have real-time collaboration even while on the go. The latest release (1.1) adds new features such as offline capabilities, email attachment support, a more intuitive touch and gesture interface, and more.
4. TomTom App for iPhone with MapShare – TomTom Map Share enables iPhone users to make changes instantly to their own maps and to benefit from free, map updates made by the TomTom community and verified by TomTom
5. MapZen PoI Collector for OSM data collection using iPhone (Download directly HERE) A mobile app enabling rapid and simple contribution and data editing of OpenStreetMap (OSM) data.
   http://mapzen.cloudmade.com/
6. lLOE – iPhone Little OSM Editor – “iLOE” (iPhone Little OpenStreetMap Editor) was built to use the “iPhone” and the “iPod Touch” to update and insert nodes in OpenStreetMap. More information at OpenGeo or Download directly HERE
7. Field Assets provides users with a versatile asset management tool. The application enables data collection, mapping, voice recording and photography, all to be carried out using the one device. iTunes download link 
8. Navman Wireless  GPS Fleet Tracking on the Go (iTunjes Link) – free iPhone app that makes real-time vehicle location maps and a variety of other fleet data available
9. iPad GISRoam from Cogent3D, Inc is reported to be the first iOS GIS application to natively load raster and elevation when 3G/ WIFI is unavailable. This is a powerful mobile GIS application for when users are away from the desk and need to collect, review, edit, and colorize Shapefile layers on your iPad/iPhone
10. CitySourced – I’m a huge fan of crowd-sourcing so this app is a huge hit. CitySourced enables the user to grab information and share a report with their local government agency. Snap a photo, geolocate it, add a description (like a pothole needing repair) and submit! This is an awesome service built using the ArcGIS API for iOS and a perfect complement to any local government looking to get up and running quickly with a useful mobile solution to connect with the local population. http://www.citysourced.com
11. BONUS app… Fulcrum for iOS - a simple to use, highly cutomizable and flexible full-blow data collection app for iOS from Spatialnetworks. Account hosting, custom form builder, sync to web, data export and much more are provided.

See more  GIS and Geo Technology Apps for the iPhone and iOS Power and Enterprise User

Field Assets from LBS Wireless (Australia)  - The application enables the user to record the location of assets and to enter information on attributes of assets in the field. The user also has the option of taking geo referenced photos and recording voice memos of assets and their attributes.

See www.fieldassetsapp.com or @field_assets on Twitter 

See Also:

• Mobile Marine Debris Tracker App - Help NOAA Track Marine Debris from the Japanese Tsunami
• The Really Big List of Mapping, Geo location Mobile developer resources, APIs and Tools
• Mobile Technology Feature - Top 10 Business Apps for Android  
• 12 Must-Have, Free Apps Mobile for That New iPhone