Attack Speed and Attack Slows

Attack Speed:

Heroes with Active Attack Speed Buffs

• Troll Warlord (Ultimate)
• Ogre Magi (Bloodlust)
• Legion Commander (Press the Attack)

Heroes with Aura Attack Speed Buffs

• Beastmaster (Inner Beast Aura)

Heroes that Need Attack Speed the Most:

• Lifestealer (more Feast)
• Tiny (high base attack dmg)
• Treant (high base attack dmg)
• Spiritbreaker (high base attack dmg, Bashes)
• Slardar (more Bashes)
• Faceless Void (more Time Locks)
• Lone Druid Bear (more Entangle proc chances)
• Slark (more stat-steal)
• Doom (has really bad Agility gain) 
• Centaur (very high Str gain, poor Ag gain)

Attack Slows:

Heroes with Ranged Attack Slows:

Jakiro (Liquid Fire)
Phoenix (Fire Spirits)
Faceless Void (Time Walk)
Visage (Grave Chill)

Attack Slow on Melee Hit

Abaddon (passive)

AOE Ability Attacks Slows:

Brewmaster (Thunder Clap)
Phoenix (Spirits)

Aura Attack Slows:

Omniknight (Aura)
Tusk (Frozen Sigil)

Defensive Attack Slows (on receiving a hit):

Lich (Ice Armor)

Team Ideas based on Attack Slows:

#1:
mid - Pugna (punish magic dmg)
Phoenix solo offlane (reduce right-click)

Faceless Void carry
Jakiro + Lich supports
Bans:  Vengeful Spirit, Silencer, Viper, Razor

#2:
Aggro Tri:  Lifestealer + Visage + Jakiro
Mid:  Viper (high magic resistance)
Safe Solo:  Brewmaster
Bans:  Batrider, Venomancer

#3:
Pugna mid
PA, Abaddon, Disruptor,
Phoenix offlane
Bans:  Viper, Razor, Batrider

#4:

Solo offlane:  Phoenix or Omni

Support:  Jakiro + Abaddon

Mid:  Tusk

Carry:  Anti-Mage (hates physical damage)