UK LETS and Complementary Currencies
Development Agency


published by

updated at 26/12/2008
In compiling a brief update to this list, which is still lacking in some details but otherwise links to where further information may be obtained, we are much indebted to Hugh Barnard. This alphabetica list includes the software we know of (marked 'free' that is viable or 'nearly' viable (in some cases, licensing not clear). It also includes some commercial software. Our aim at LETSlink is to make all options known on the basis that different programmes will suit LETS at different stages in their development, starting with the abacus, manual ledgers and Excel spreadsheets! We are now becoming involved in helping LETS directly, because software which is freely given always requires expertise to host and install, and training to use it, and there will be an impact on the way the LETS scheme operates. Anyone wanting to write software please see what projects are already under way and consider joining an existing project rather than re-inventing the wheel. Anyone who knows of software not listed here, who has technical skills to help survey and install software, and/or who wants to have software installed for your scheme please contact us or go to www.cxss.info

Programme Name, Function
What it do? eg Member List, Offers & Wants List, Accounts, Statistics, etc. Language or standard software on which based.

System Requirements, Support, Contact
Special Features. Platform on which it runs, ie DOS, Windows, Mac, Unix/Linux. Minimum System Requirements: eg Windows 95, 1GB hard drive, 1MB free space, 64kB memory, 800x600 display, etc.
When the programme was first written. Current version number and date. Current Development Plans. Nature of support provided. Who is using it, with contact details. Feedback from users, both recommendations, or about overcoming any particular problems

Further Details/Terms
Is it Proprietary, Free /Open Source, Freeware, Shareware, or Other? License details? Cost if any to buy, license or use. Is it open to user-modification? Link to Demos and/or
Who is using it?

Background links


CES Community Exchange System - international network set up under the auspices of SANE - South African New Economics: www.community-exchange.org Groups are asked to set up an account - software itself not available.

http://cogs.avbp.net/ - http://www.avbp.net/ocp/
Post-Carbon Institutue - Sweden: http://www.postcarbon.org/node/2135

Consultancy in development
Donations requested




DualCurrency Systems http://www.dualcurrency.com/  


Project: www.ecomoney.co.uk
Inaugural scheme: www.scunnymoney.com

Consultancy in development
FRIEND2FRIEND Based on altrustic model, being developed by Robin Upton www.altruists.org/projects/ge/ff/
Geek credit http://home.gna.org/geekcredit/  


http://www.camdenlets.org camden@letslink.org
iWAT www.media-art-online.org/iwat/more about iWAT  
perl/file storage
http://lentils.imagineis.com/cgi-bin/lets/webtool.cgi 'free'
LETSAssist Standalone software developed in Australia  
standalone - microsoft access
www.letslinkscotland.org.ukwww.cxn.org.uk Commercial - LETSlink Scotland
LETS Forum
http://www.letsf.co.uk/ 'free' LETS Southwest
This access-based programme holds member records and does Accounts.
This is a customised version of Access, which is the standard Microsoft, so a windows PC is required.
Ongoing support is provided by the author, Gerry Vahrman, to purchasers of the software contact lets@loissoftware.com

The original website is at http://www.fourthcornerexchange.com/

'free' under GPL (GNU Public License). Working on UK version at www.localexchange.org.uk
In testing phase: LLL
- co-development invited
This access-based programme holds member records and does Accounts.
At Oswestry & District LETS we use a Microsoft Access database to hold details of all our members, their wants and offers, and all the Oswald transactions. We have made an empty version of the database. It is about 300k ZIPped, and unzips to a 1.6MB database file. It requires Microsoft Access 2.0 or later - users with later versions of Access (e.g. Microsoft Office 95) will automatically be asked if they want to upgrade the database to the latest version when they first load it The database will automatically run a main menu screen, with buttons for all the common tasks. People familiar with Microsoft Access, who want to run ad-hoc reports, or get at the internals of the database should use "Unhide" in the "Window" menu to bring up the main database window.
'free' - To download a free copy of the software go to the website of odLETS, pan down and click on LETS database. No help or support is provided, although I will try to reply to emailed requests for help if I have time - send requests to Nikki Locke: <odlets@trumphurst.com>
php/mysql -tikiwiki based
http://demo.openmoney.orgwww.openmoney.org/go/cc.html 'free'

This web-based programme does Accounts. The LETS administrator has access to cheque entry, and the members can view the results on the LETS website.

PyLETS is written in Python and runs on Unix and Linux. It is a web-based CGI programme, and it uses file locking for data persistence so is very low cost, not needing a relational database backend. Nightly backups to another site are handled by email. In practice it will run on any platform that can do Python CGIs including Windows. Minimum system requirements are whatever will run your web-server, eg Apache - please refer to web server documentation.

PyLETS was first written in 2002. No support is offered. Implementers must be willing to read source code. The current version is 0.4, released May 2003. Development plans include additional columns for historical turnover, implementing year end processing. It is currently being used by Coventry LETS, where Richard Kay is the LETS Accountant. Feedback so far is that "it works much better than the paper-based system it replaces".

'free' - PyLETS is free software written by Richard Kay, operating under GNU Public License available as a free download. It is open to user modification, and if you do modify it the license specifies you must make source code of your changes available to your users. Richard's contact details are: rich@copsewood.net

LETSlink London are working on installing this software for for Camden LETS, in London UKg

REGENEROSITY Geoff Cheshire (USA) - geoffch@geoffch.cnc.net - http://Regenerosity.com
RIPPLE http://ripple.sourceforge.net/  
Lists Members, Does Accounts, Provides statistics. Requires Access 2000 or later for the latest version.
Timekeeper (a) lists members including services offered and needed, (b) provides search for members providing or needing a service with constraints on time and place, (c) lists transactions, (d) can generate statistical reports and reports for each member showing their transactions and account balance. This program started out with Access 2.0 about 10 years ago. User documentation is provided by several Time Bank organizations. Latest version is 2.24. www.timekeeper.org/timekeeper/ Free for download from the Timekeeper web site. Timekeeper is used by hundreds of Time Bank organizations in many different countries.


Richard Kay hosts a discussion list for LETS-specific software:
List-Subscribe: <http://copsewood.net/mailman/listinfo/mrsdev>,

A series of software meetings held at Limehouse Town Hall during 2005
minuted here by Hugh Barnard

concurrently with the LETSlink London's How To Pilot Course
for further details see: http://letslinkuk.net/london/training/index.htm

Meanwhile we have started a comparison table - needs updating

© Published by LETSlink UK, 12 Southcote Road, Tufnell Park, London N19 5BJ