ea-geier is a tool written in PHP intended to handle accounting on a cash bases for Austrian companies (Buchhaltung zur Einnahmen-Ausgaben-Rechnung). With modular accounts code and a multi-lingual design it is easily adjustable for other countries.
While it's the only simple, freely available OpenSource cash base accounting software, it does not really work well. Filling out the forms is not very convenient, ea-Geier does not really help you by autocompleting or anything else. You can't delete any vouchers, clients etc. that you once created, you can't add users from a central place or delete them, there is no restriction of user creation - if it is online, EVERYONE can create an account, including spambots, you would have to do a .htpasswd protection for that. Tried using it productively - and desparatedly gave up. All in all, this is old-school PHP code from approx. the year 2000 or so. No way "Web 2.0".
Ea-geier works wonderful.