re: Pen and Paper Strength App

Been working through P&P programs for over a year now. Have worked through at least 10 of them and really enjoy the structure. Working out 3 mornings a week. But it is getting repetitive, and I'm looking for more cardio now that I feel good in my form, in my maxes, and seeing some gains.

Any advice on other programs to move to that would still involve basic lifting but also get the heart rate up more often?