Smack 3.3 发布了，Smack是一个开源，易于使用的XMPP（jabber） Java 客户端类库。
新版本改进内容：
[SMACK-331] - Add support for XEP-0184: Message Delivery Receipts
[SMACK-345] - Inproved detection of last activity
[SMACK-361] - Add support for XEP-0115 Entity Capabilities
[SMACK-376] - Setting a custom trust manager to control certificates from outside
[SMACK-388] - XEP-199 XMPP Ping support
项目主页：http://www.igniterealtime.org/projects/smack/
来自:开源中国社区
