Australia - In Australian Capital Territory, South Australia, and Northern Territory, possession is only punishable by a fine.
Bangladesh - No laws on the books.
Belgium - Legal with under five grams, no smoking in public.
Brazil - Punishable only by drug treatment and fines.
Chile -- Legal to possess five grams and consume in your home, illegal to buy and sell.
Colombia - Decriminalized under 20 grams.
Czech Republic - Decriminalized.
Ecuador - Decriminalized up to 10 grams.
Estonia - Small quantity decriminalized, but you may be subject to a fine and administrative (non-jail) arrest.
Germany - No prosecution if caught, only confiscation.
Italy - Decriminalized.
Jamaica - Will be decriminalized by the end of 2014.
Mexico - Decriminalized in small amounts.