I've used many foam roller.  With an exception of the vibrating hyperice viper which sells for $200...this is the best.  

foam roller
$35

For beginners.  Unlike most resistance bands, this item has heavy duty nylon sleeve covered for double protection to users or to the tubes. 

Resistance Training Bands
$37

All fitness levels.  Weight options range from 20lbs to 100lbs per dumbbell.  

Exercise ball
$12

Adjustable Dumbbells
$72

Light and fast.  Best for soft surfaces.  Do not use on cement or asphalt as the rough surface will destroy the coating on the cable.

WOD Nation Speed Jump Rope
$18

Anti-burst, anit-slip.  2000lb weight capacity.  All fitness levels.  Great tool to strengthen core. 

Light. Portable.  Great for travel using just body weight for resistance.  For every fitness level. 

TRX GO Suspension Trainer
$130

Pull up assistance bands
$15

Pull up bar
$22

exercise mat
$21

Great for increasing pull up strength and overall strength training. I personally use these instead of regular resistance bands for a more intense workout. 

Allows for wide, reverse and neutral grip pull ups.  By far the best bang for your buck. 

Easy to clean.  1/2 inch cushion makes it comfortable to do pretty much any exercise.  

PowerBlock Adjustable Dumbbell Set 
$410

The best adjustable dumbbell.  Great for dynamic movements.

Handles used with Pull Up Assistance Bands $22

For advanced fitness levels.  Pair these with the Pull Up Assistance Bands for a better resistance band workout.