I have been looking for a SQLite database administration tool and I have seen this tool: SQlite Expert Personal. It is completely free and includes all common features such as query builder, data editing, import/export data etc.
Download: http://www.sqliteexpert.com/SQLiteExpertPersSetup.exe
In order to find out more managing tools for SQLite, have a look at this web site: http://www.sqlite.org/cvstrac/wiki?p=ManagementTools