Can we use any webmethods component as our front-end to host the application as we normally use as Weblogic or tomcat?

Hello Justinajqz.... These all are Middleware technologies and never acts as front end. In webmethods you can create services to communicate with other applications, whether it can be Front end or backend systems as per your business requirements. To get better idea please go through "Understanding webmethod Product Suite" doc

What about CAF?

Yes you can use CAF to build your portlets and those portlets are deployed on MWS...so you can easily create the portlet application using CAF

Hi Justinajqz, I dont have much idea about CAF, any knwkledge sharing would be an add on for me in this regards. Thanks for this

Yes that can be done through dsp pages, CAF etc..