YaGo is a instant messenger for java enabled phones . It is a powerful Yahoo Messenger client for the mobile user. Has a fast connection, high refresh rate and very low bandwidth consumption.
instant
GTalk Instant Messenger For J2ME Application For Java Mobile Phones (Jar/JAD)
GoTalkMobile is GTalk instant messenger (IM) client for your J2ME-enabled cell phone. It’s used for sending and receiving Google Talk and Jabber instant messages just like SMS, via GPRS at no additional cost! It’s written in J2ME, and we have MIDP1.0 and MIDP2.0 compatible versions.