Httpsqs is a project mainly written in ..., it's free.
HTTP Simple Queuing Service
HTTPSQS is a Simple Queue Service based on HTTP GET/POST protocol. This is free software, and you are welcome to modify and redistribute it under the New BSD License.
This is a fork of Zhang Yan's original HTTPSQS project with an aim to clean up and modularize code so new backend storage types can be experimented with.
The current revision users YDB instead of Tokyo Cabinet.
YDB - http://code.google.com/p/ydb/ Tokyo Cabinet - http://www.1978th.net/tokyocabinet/ Original HTTPSQS - http://code.google.com/p/httpsqs/