Hi Sunil,
I'll start with your second question first, there is no other software available to render your XPression design, other than XPression.
However, if you can't take your XPression Studio with you, you can always try to rent a machine.
Another option you can try, is to use a (gaming )laptop with an external videocard. There are different solutions available, such as the AJA IO XT (https://www.aja.com/products/io-xt) or a custom solution using an external exclosure such as a Sonnet Echo Express for example, together with an existing videocard that you may still have lying around.
Do note that both solutions require a USB-C or Thunderbolt-connector on the laptop.
In order to run Xpression on it, you will need to use the USB-dongle which holds the XPression-license on it. This USB-key usually is inserted on the inside of the PC-case, but you can remove it temporarily to use on your laptop.
Just to be clear, I'm talking about the Studio-license because with the Designer-license you can not render to a video-output.
I travel quite a bit for events all over the world and I have assembled a travel-kit using an MSI gaminglaptop (which has an Nvidia-card built in) together with a Sonnet Echo Express II with an AJA Corvid 88 inside. I also use a StarTech convertor from USB-C to Thunderbolt.
Hope it helps!
#XPression