Here you are:
Afiya Grove
Color= Green Type= Enchantment Cost= 1G MI(R)
Text (MI+errata): ~this~ comes into play with three +1/+1 counters on it. ; At the beginning of your upkeep, move a +1/+1 counter from ~this~ onto target creature. ; When ~this~ has no +1/+1 counters on it, sacrifice it.
stinks...
Cycle of Life
Color= Green Type= Enchantment Cost= 1GG MI(R)
Text (MI+errata): Return ~this~ to its owner's hand: Target creature you played this turn is 0/1 until your next upkeep. At the beginning of your next upkeep, put a +1/+1 counter on that creature.
stinks...
Decree of Savagery
Color= Green Type= Instant Cost= 7GG SC(R)
Text (SC): Put four +1/+1 counters on each creature you control. ; Cycling {4}{G}{G}. ; When you cycle ~this~, you may put four +1/+1 counters on target creature.
interresting, but expensive
Elven Rite
Color= Green Type= Sorcery Cost= 1G SH(U)
Text (SH+errata): Distribute two +1/+1 counters among one or two target creatures.
looks ok to me
Ferocity
Color= Green Type= Enchant Creature Cost= 1G MM(C)
Text (MM): Whenever enchanted creature blocks or becomes blocked, you may put a +1/+1 counter on it.
stinks...
Forgotten Harvest
Color= Green Type= Enchantment Cost= 1G PY(R)
Text (PY): At the beginning of your upkeep, you may remove a land card in your graveyard from the game. If you do, put a +1/+1 counter on target creature.
maybe in some decks
Invigorating Boon
Color= Green Type= Enchantment Cost= 1G ON(U)
Text (ON): Whenever a player cycles a card, you may put a +1/+1 counter on target creature
have to build your deck on it.
Ley Line
Color= Green Type= Enchantment Cost= 3G MM(U)
Text (MM+errata): At the beginning of each player's upkeep, that player may put a +1/+1 counter on target creature of his or her choice. [Oracle 2002/03/01]
some people use this, but I dont like it. Too costly for a card which help opponent too.
Predatory Hunger
Color= Green Type= Enchant Creature Cost= G EX(C)
Text (EX+errata): Whenever an opponent plays a creature spell, put a +1/+1 counter on enchanted creature.
maybe in some environments
Thrive
Color= Green Type= Sorcery Cost= XG PY(C)
Text (PY): Put a +1/+1 counter on each of X target creatures
might be fine
Titania's Boon
Color= Green Type= Sorcery Cost= 3G US(U)
Text (US): Put a +1/+1 counter on each creature you control.
maybe even better