Google Latitude

Google Latitude users can now earn offers when they use the service to check-in at different venues.
Google Latitude will reward users who regularly check-in to particular venues with 'Regular', 'VIP', or 'Guru' status. Your status at a particular venue could also earn you rewards in the form of offers that the venue has created for particular status levels.
For example, a cafe may give their Regulars a discount on a cup of coffee. You can find places where check-in offers are available in Google Maps for Android search results and Place pages. This means that you can check your Android phone for nearby offers before deciding which venues to visit.
Check-in offers are being launched in Austin this week but Google has plans to expand the service. You can learn more at google.com/mobile/checkin.
Via: Google LatLong
Desktime

If you are looking for a desk or office from which to work or have spare desk space then you need Desktime. Desktime is a co-working search engine for Chicago and Austin (with presumably more cities on the cards).
Using the Desktime Google Maps based search engine you can search for a co-working space by location. The map includes a number of filters that let you search for properties with high speed internet, parking facilities, 24 hour access etc.
Loosecubes

Loosecubes is a website to find and share co-working spaces. Anyone who has a few extra desks or office space can use Loosecubes to rent the space.
If you are looking for a co-working office space you can use the Loosecubes Google Map to find a desk near your location. You can refine the results shown on the map to show properties that are available to rent by the day or those that require a minimum of a month. You can also refine the results to show 'open desks', 'private offices', 'conference rooms' or an 'event space'.
Mobnotes

Mobnotes lets you share your location with friends, share your favourite places, search for venues around you and view other people in your vicinity. The application is available from the desktop and as an iPhone and Android app.
Google Maps is used extensively by Mobnotes. The home page features a real-time animated map of the latest check-ins made by users of Mobnotes. You can also use Google Maps to show your location and to view places/venues and other users nearby.
You can also use Mobnotes to let your friends know where you’ll be at a particular time. You can specify a location and inform your friends when you will be there using the Mobnotes 'Events' feature.
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NT paieška

NT paieška is a nicely designed Google Maps mashup to search for real-estate in Lithuania.
Using the site it is possible to search for property in Lithuania by location, price and by the number of rooms. The search facility includes a handy slide-bar function that allows you to adjust the price range for your property search and for the number of rooms you are interested in.
The results of a property search are displayed on the map and listed in the map sidebar. If you mouse-over the results in the sidebar the location of the property is highlighted on the map. If you click on an individual property you will be taken to a page with the full details.
Haybol - Real Estate Search

Haybol is a Google Maps based real-estate search engine for the Philippines.
Using the site's simple search feature it is possible to search for property by location and find nearby homes on a Google Map. It is also possible to view the results of a search in list form. The map includes buttons to filter the returned search results by rent, foreclosure or sale.
If you click on an individual map marker you can read the full details for the selected property, including the price and the seller's contact details.
New Zealand Walks Information

If there is one thing that New Zealand is not short of it is gorgeous countryside. If you fancy experiencing the best of New Zealand's spectacular glaciers, picturesque mountains and rolling hills then you should check out the nearly 3,000 walks mapped by New Zealand Walks Information.
All the walks can be accessed by location from the Google Map on the site's home page. You can select to view each individual walk on its own Google Map. The individual maps show the route of the walk, the distance and include an elevation profile.
Each walk also contains handy links to other walks nearby and their distance from your selected location.
FusionTablesLayer Builder

The FusionTablesLayer Builder is a great little wizard for creating a Google Map from a Fusion Table.
To build your map all you need to do is add the table id of your Fusion Table and specify the name of the column holding your location data. That's all there is to it! FusionTablesLayer Builder will now create the html for your finished map.
The wizard does provide a number of other useful options. You can set the height and width of your Google Map. You can also set the centre location and the initial zoom level.
A really nice option also lets you add a search box for your map or a drop-down menu. You can even specify which column of your Fusion Table the search box or drop-down menu will use.
Here's an example map I created with FusionTablesLayer Builder in a matter of minutes. The example is a map of temperatures taken around the UK in December.
ToothTag

ToothTag is an app for Android phones that includes a number of very useful location services.
Using ToothTag it is possible to tag things and locations and receive notifications based on your proximity. For example you can tag where you have parked your car so that you can find it again without any problems. The application can also automatically check you in to a number of location based services, such as FourSquare or even alert you when friends are nearby.
ToothTag is built upon NeuAer's powerful Proximity Platform. The Proximity Platform is a lightweight client and hosted server side technology that allows mobile applications on Android devices to add presence events in their applications. The client can be used by Android developers to build their own automatic check-in services or present information to users based upon location.
Checkin Mania

Checkin Mania is a Google Maps mashup to track who is checking in around you using FourSquare, Gowalla, Brightkite and Twitter.
To browse a location you can use the search facility or you can just click on the map. The map will then display all the venues around you and show you who are the top users of that venue with the popular location based social media apps.
It is now possible to add a Chekin Mania map gadget to your own website or to your Google home page. You can adjust the height and width of the Checkin Mania gadget, you can also set a default location and select the services you want displayed (Foursquare, Gowalla, BrightKite or Twitter).