The popular cross platform messaging app; IM+ Pro is now in BlackBerry World ready for you instant messaging addicts to grab. If you have not used it before it is essentially a cross platform messaging client with support for Gtalk, Facebook chat, Skype, just to name a few. The application is actually a port of their Android app which works beautifully. I reviewed it a while ago for our sister site androidcentral so if you fancy reading all about it you can do so there.
There's a load of great features within the app apart from just the instant messaging. You can send photos, have group messages in Skype and customize your sound notifications just for starters.
IM+ Pro for BlackBerry 10 will set you back £3.50/$4.99 and although not the cheapest application it does offer good value for money. I know loads of folk that use it daily and wouldn't want to be without it.
If you use a few different instant messaging clients why not have them all running together in IM+ Pro? Makes sense to me.