A lot of people were asking for it, so this weekend I developed OxygenGuide and released it under an open-source license.
Imagine you are traveling around the world and suddenly find yourself in Riyadh looking for a restaurant or a place to sleep. Carrying travel books is a pain, and browsing the Internet on your mobile phone abroad will probably cost a lot.
That's where OxygenGuide comes in: It is a compact offline travel guide that takes only 150MB of your smartphone's storage space. The data is based on Wikitravel, but customized for small devices. With this world travel book on you mobile device, you will travel lighter and further. The current version works for notebooks such as the Eee PC. I will try my best to release an Android version during the next weekend.
Update: Now usable on Android too.