Check out a nice sound generator by The Sound Pack Tree.

Check out a nice sound generator that is based on the Footstep Loops sound pack by The Sound Pack Tree. The tool is easy-to-use and features tons of variations. 

The sound pack features footstep loops designed to ease your post-production or game audio workflow:

• 195 seamless loopable files
• 15 different footstep types in 13 different speeds each
• loops made for easy layering/combining/alternating, all exactly 30 seconds long
• barefoot, socks, sneakers (3x), slippers, flip-flops, boots, mud, puddle, gravel, metal & wooden stairs up+down
• 40 – 200 fpm (footsteps per minute)

You can get the pack for € 49 here.