I have a laptop with non-backlit keyboard. Are there any hacks available so that I can view the keys in dark?
If the light from the screen isn't sufficient to be able to see your keyboard in a dark room (it should be, unless you work in a black background with very little light color), you might try mounting a USB powered LED light on the screen in a position to shine on the keyboard.
There are glow-in-the-dark materials that can be cut into key-cap size.
Print the letter on each with a fine tip permanent marker to keep your fingers free from the inked mark.
The glow should help you find the right key in the dark for a little while after the lights are off. Some materials and colours are visible longer than others.
Found this video hack of how to create a backlight for your keyboard using USB el-wire - very helpful!
The demonstration uses a desktop keyboard, but instructions indicate same method and recommendations can apply to a laptop keyboard, as well.
USB el-wire offered in variety of colors at CoolGlow.com for ~$16.00 @ 3 yds. Amazon offers 10 ft. @ ~$10.00. You can also search the internet for "USB el-wire" for more options.
Hope this helps.