Cycle Hire Widget This app costs $1.99 and is an app that shows you using GPS your closest Cycle Hire location and also has real-time info on the availability of bikes and slots at the location. Useful.
London This guidebook for London is free! It has activities, tours, food and drink, nightlife, shopping, and other tips.
Raileasy Train Booking This is a great app if you plan on taking trains in the UK. You can get routes, schedules, maps, and ticket purchasing all on your phone. Useful!
Property Finder UK This app allows you to search tons of for sale and rental properties all over the UK. Search by "for sale", "for rent", "to share", price, location, and number of bedrooms. Uses Google maps. Needs more properties!
UK Jobs This is the app for the UK job market. It's got over 300,000 listings searchable by job title and location. you can email yourself jobs and apply online with your resume/CV. Not very well formatted.