Sunday, May 27, 2007

P2P-Systems for Mobile Devices

P2P-systems are very important communication infrastructures in the internet. Mobile P2P-systems are still not common, but there exist some solutions to let mobile clients take part in them. No idea what P2P-systems for mobile systems could offer in the future? Think of mobile personalized collaborative services as recommendation systems and mobile distributed search services that can benefit from using P2P-technology. Some already existent solutions will now be introduced.


JXME is a framework to build J2ME-based P2P-applications, aimed at giving access to the JXTA network for connected devices with limited ressources as phones and PDAs. JXME-Peers run on devices supporting the MIDP 1.0, MIDP 2.0 and the CDC. They can participate in P2P-activities like peer- and content-search, P2P-communication, building of peer-groups and file transfer.


Jabber clients for mobile devices as Bombus please many Instant-Messaging enthusiasts, as mobile users can be logged in to many IM-systems like ICQ, Yahoo! and MSN at the same time using the XML-based open source Jabber protocols. Mobile file transfer is also supported by some clients, e.g. the Bombusmod.

Gnutella and BitTorrent

Symella and SymTorrent are two great and free clients for connecting Symbian-based phones to the Gnutella- and BitTorrent-networks. While Symella does not allow the upload of files, SymTorrent implements this function. Their code is open source. Another very sophisticated BitTorrent-client for PocketPCs is WinMobile Torrent which even supports the creation of torrents in the application and runs very stable and fast.

Emule P2P-client for Pocket PCs

With MopiPhant the first working standalone Emule-client is available for PocketPCs since April 2005. Although this program is working pretty well, it seems that is is not developed any further.

Sunday, May 13, 2007

My TOP 10 J2ME Applications

In my first post I would like to present my TOP 10 mobile Java applications, that I really like and would surely miss, if they would not be available anymore. The list starts with the MIDlet I use most often.
  1. Opera Mini (The best J2ME-based Internet Browser)
  2. Google Mail Mobile (Google Mail-client with a really pretty GUI)
  3. Papla (Really nice Jabber-IM-client)
  4. Google Maps (For viewing maps and route calculation)
  5. WLIrc2 (The best mobile IRC-application which also supports DCC file transfer)
  6. JIMM (Very functional ICQ-IM-client)
  7. JumpRadioGuide (A MIDlet by the german radio station JUMP, for news and traffic infos)
  8. RadioBee (Listen to internet radio stations on your phone)
  9. ZelfiSMS (Program to send free SMS from germany, austria and switzerland)
  10. MMail (A small email client with POP3/SMTP mail server support)
Hope you find these suggestions useful.