Flash
Many new sites (Justin.tv, Ustream.tv etc.,) now a days offer free streaming (including live cricket sometimes) using Flash player and unlike traditional P2P sites like Sopcast, TVU, TVants etc., which are very popular for live cricket streaming, you don’t need any extra plugin to watch these live cricket streams as most of the systems (95%) are now a days installed with Flash by default.
Also Flash player is not P2P (yet), hence you will be saving a lot on bandwidth. Just open the link which has live cricket streaming embedded and you should be able to watch without any problem.
*Sometimes this may not work if you are behind firewall and few ports are block (That will be the case in Offices/Schools)