The rise of class struggle in Europe and new workers' parties

In France, Greece, Portugal and other counties around Europe, massive strikes and working class resistance are taking place, on a scale which is uncomparable for the past 10 to 25 years. Attacks on pensions, labour laws and immigrants are increasing while most of the old workers' organisations continue to move to the right. Which new formations are in the process of "changing the left"? And what is needed to build new political alternatives for workers and youth?