A report claims that government tax and benefit policies will hit women harder than men.
Around 1,500 pensioners marched against the austerity cuts demanded by international lenders.
No familiar ruling coalition looks tenable.
After a strong result in a new poll, the party's hand is strengthened ahead of coalition negotiations.
The former opposition leader has pledged to act as a neutral "refugee" in the country's heated political scene.
Syriza, Greece's ruling party, is one of the groups which make up the 'Blockupy' movement.
Spain's far-left party have declared their intent to follow in Syriza's footsteps after election triumph.