Tate Modern is marking its 10th anniversary by hosting No Soul For Sale - A Festival of Independents.
The world's most innovative independent art organisations, from Shanghai to Rio de Janeiro, have been invited to take over the Turbine Hall for the weekend with a mix of cutting-edge art works.
Barbur, a non profit gallery in Jerusalem, is staging a Barbur bazaar with artists working on site surrounded by local carving and trinkets.
They are opposite the Dublin-based Thisnotashop installation where a rota of artists must maintain a continuous 'reading'.
Not An Alternative from Brooklyn, which aims to integrate art, activism and technology, has a focus on the recession with a boarded up American house.
A recurring feature is the pile of a paper but not all are just artworks. Some sheets are givaways with essays and short messages.
Refreshments on the Turbine Hall Bridge include a limited edition anniversary beer from BrewDog brewery which has been supplying the Tate for some time. The special brew has a vanilla infusion.