This is my ideas for Sponge plugins from Bukkit. Long list with links to plugin pages.
Empirecraft: A nice Towny and Factions plugin in one with its own features to bring it together. WIP
http://dev.bukkit.org/bukkit-plugins/empirecraft/
EssentialsX: Optimized version of Essentials with a few features sprinkled on there.
simpleFactions: An improved version of Factions and a different one too.
http://dev.bukkit.org/bukkit-plugins/simple-factions/
McMMO Extras: Adds a Exp bar at the top of your screen when you level up with mcMMO
http://dev.bukkit.org/bukkit-plugins/mcmmoextras/
BossBarAPI: A requirement for mcMMO extras
https://www.spigotmc.org/resources/api-bossbarapi-1-7-1-8.7504/
Quests: A quests plugin. It add quests and has mcMMO support. Check the site
https://www.spigotmc.org/resources/quests.3711/
LaggRemover: It helps your server a TON with ram usage. Its really helpful
http://dev.bukkit.org/bukkit-plugins/laggremover/
PerWorldPlugins: Allows plugins for certain worlds.
http://dev.bukkit.org/bukkit-plugins/perworldplugins/
Timeismoney: Adds a timer for the amount of time you spent on the server and pays.
http://dev.bukkit.org/bukkit-plugins/timeismoney/
uCars and uPlanes: adds cars and planes to minecraft.
http://dev.bukkit.org/bukkit-plugins/ucars/ uCars http://dev.bukkit.org/bukkit-plugins/uplanes/ uPlanes
ProtocolLib: Allows certain tasks not possible with Bukkit.
https://www.spigotmc.org/resources/protocollib.1997/
LibsDisguises: Just like Disguisecraft with more. Its better too
https://www.spigotmc.org/resources/libs-disguises.81/
TownyChat: Chat with channels and give prefix support like Mayor for Towny
http://towny.palmergames.com/towny/townychat/
Questioner: For Towny informs town members if someone is invited.
https://code.google.com/a/eclipselabs.org/p/towny/wiki/Questioner
CraftBook: Adds new mechanics to minecraft and highly customizable
This is my ideas for Sponge plugins from Bukkit. Long list with links to plugin pages.
Empirecraft: A nice Towny and Factions plugin in one with its own features to bring it together. WIP
http://dev.bukkit.org/bukkit-plugins/empirecraft/
EssentialsX: Optimized version of Essentials with a few features sprinkled on there.
http://www.curse.com/bukkit-plugins/minecraft/essentialsx
simpleFactions: An improved version of Factions and a different one too.
http://dev.bukkit.org/bukkit-plugins/simple-factions/
McMMO Extras: Adds a Exp bar at the top of your screen when you level up with mcMMO
http://dev.bukkit.org/bukkit-plugins/mcmmoextras/
BossBarAPI: A requirement for mcMMO extras
https://www.spigotmc.org/resources/api-bossbarapi-1-7-1-8.7504/
Quests: A quests plugin. It add quests and has mcMMO support. Check the site
https://www.spigotmc.org/resources/quests.3711/
LaggRemover: It helps your server a TON with ram usage. Its really helpful
http://dev.bukkit.org/bukkit-plugins/laggremover/
PerWorldPlugins: Allows plugins for certain worlds.
http://dev.bukkit.org/bukkit-plugins/perworldplugins/
Timeismoney: Adds a timer for the amount of time you spent on the server and pays.
http://dev.bukkit.org/bukkit-plugins/timeismoney/
uCars and uPlanes: adds cars and planes to minecraft.
http://dev.bukkit.org/bukkit-plugins/ucars/ uCars http://dev.bukkit.org/bukkit-plugins/uplanes/ uPlanes
ProtocolLib: Allows certain tasks not possible with Bukkit.
https://www.spigotmc.org/resources/protocollib.1997/
LibsDisguises: Just like Disguisecraft with more. Its better too
https://www.spigotmc.org/resources/libs-disguises.81/
TownyChat: Chat with channels and give prefix support like Mayor for Towny
http://towny.palmergames.com/towny/townychat/
Questioner: For Towny informs town members if someone is invited.
https://code.google.com/a/eclipselabs.org/p/towny/wiki/Questioner
CraftBook: Adds new mechanics to minecraft highly customizable
http://dev.bukkit.org/bukkit-plugins/craftbook/
Well thats all I have now. I think these would expand the library of Sponge and really make a server yours and not someone else’s. I hope some people look these over and think about porting them. Thanks for checking this out. Please give feedback.