Any good opensource SharePoint components that can abstract you from the inner SharePoint plumbings?

I am looking for a good reusable set of components that can be used to communicate with SharePoint via web services, preferably open source.

I want some abstraction from CAML and WebDav and SharePoint Web Services that could help me speed up my development time.

Ideally I want to select, insert, update and delete from lists, manage attachments in list items, download items from sharepoint, retrieve user meta data from owner info. This sort of thing.

Does any such abstraction exist for Sharepoint 开发者_高级运维that use SharePoints web service model, obviously the use of the MOSS Component API is out of the question because it will only run on the hosted MOSS server, and I am writing an SOA app.

Thank you

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Why it's not opensource and it's available only for SharePoint 2010, Microsoft has done a good job of making the SharePoint API accessible on client platforms with their Client Object Model. Versions exist for Websites based on JavaScript, a managed .NET dll for Winforms/WPF and Silverlight client. More information at

http://msdn.microsoft.com/en-us/library/ee537013(v=office.14).aspx

Not sure of anything for SP 2007 other than the OTB Web Services.