The Canary.  An on-line news-sheet. Very good, although stridently "left wing". But addicted to "click bait". And too many advertisements.

Open Democracy, an "independent global media platform" which offers "free thinking for the world".  Has interesting articles on e.g. Labour self-sabotage, and the malign effect of the ERG. Looks good 

Vox Political.  A very active blogger (Mike Sivier). Particularly vehement on the misdeeds of the DWP.

Craig Murray.  An active blogger. Bills himself as "Historian, Former Ambassador, Human Rights Activist". One of the most incisive and articulate commentators around.  Highly recommended

Anoher Angry Voice (AAV). A left-wing political blog written by Thomas G. Clark, established in 2010, says Wikipedia, which "strongly supported the Labour Party leadership of Jeremy Corbyn". Also present on YouTube. 

Mazin Qumsiyeh, a Christian Palestinian academic and environmentalist. Very articulate, very incisive, and extremely benign.   Highly recommended

The Skawkbox. 

IMPRESS, "the only independent press regulator in the UK". Unverified

Newsguard, an Internet monitoring and rating site.  Unverified

AVAAZ  A "campaigning community" for "people powered politics". Claims 64M members world wide.

38Degrees.  A very active UK petitions site.

Change.org The "world's platform for change". Claims 374M members.

Jewish Voice for Peace (JVP) A USA-based group promoting peace and justice in Palestine.  Needs your support 

Extinction Rebellion (XR), the UK branch of the global movement against climate change and its effects.

Quaker Action on Alcohol and Drugs (QAAD) is "a Recognised Body of the Religious Society of Friends (Quakers) and a registered charity". 

Campaign for Nuclear Disarmament (CND) 

Greenpeace  

Just Space | Community groups supporting each other on London planning

y

Howard League for penal reform

TBD  Act UN 

https://www.democracywithoutborders.org/

Quakers and Business (Q&B) 

Electoral Reform Society (ERS) The original. Strong advocates for STV.

Make Votes Matter. Claims to seek "fair" votes, but in fact advocates PR.

New Politics Rules. A Facebook group aiming at "UK democratic revolution".

Power2010 (with Unlock Democracy?)

Trust The People  Majoring on climate change (with XR), but possibly seeking constitutional reform to enable that.

Positive Money 

Tax Justice Network

Evonomics, "the next evolution in economics".

New Philanthropy Capital (NPC) 

Political groups

The Fabian Society, a worthy group notionally dedicated to patient, rational progress,  "Britain's oldest think tank" and "The future of the left since 1884", but "untrammelled by party". 

Momentum is "a people-powered, vibrant movement" who "aim to transform the Labour Party, our communities and Britain".

y

Quaker Socialist Society (QSS) 

yNew

The Left Wing Society, a Facebook group "aiming to keep Jeremy Corbyn's vision".