UPD: post fixed, thank you, Robin.

Time Out's City Life Index, a survey of 15,000 people in 32 global cities, ranked cities in categories across food, drink, culture, friendliness, affordability, happiness, and liveability. So, here there are.

The Economist has put together its annual list of the cities that have the highest standard of living based on factors such as crime, health care, culture, and access to transportation.

Navigation company TomTom has published a list of the most congested cities in the world, which was made over nine years. Each city's congestion level was given a percentage score out of 100, with levels ranging from 66% in the most congested cities to 9% in the least. TomTom defined the congestion level as the "increase in overall traffic times when compared to a free flow situation (an uncongested situation)."

The Economist Intelligence Unit compiled a report on city safety. The report is based onfour thematic categories: digital security, health security, infrastructure safety and personal safety are taken into account in the report. Here are 15 cities that dominate at least in one of these domains:

Here is the list of the wealthiest and economically healthiest world's cities, according to Arcadis NV, a global design and consulting company. Arcadis ranks cities across three sectors of sustainability: People, planet and profit. So, basically, the 'people' sub-index rates social performance including quality of life. The 'planet' sub-index captures 'green' factors like energy, pollution and emissions. And the 'profit' sub-index assesses business environment and economic health.
 

Here is the report of The Economist Intelligence Unit about the 9 most expensive cities to live in the world. Such factors as food costs, fuel costs, and salaries were taken into account.