In the world of mobile platforms, Tizens but a new entry thats been through some tough times since its inception. The circle of 36 companies (aptly called the Tizen Association) backing up the open source OS is putting up a good fight, though — it even just welcomed 15 new members to its number. These include some big names you might recognize, such as Chinese search engine Baidu, Japanese carrier Softbank, hardware manufacturer ZTE and weather app AccuWeather.