Bukkit

Flow is a liquid control plugin. It has many features to try and provide complete control for both water and lava. It was designed with the Op in mind, and can be used for many purposes, such as grief prevention, mechanics, and most importantly, fun!

This plugin can manipulate both water and lava, in a few ways that have never been done before.

An easy and simple command (/flow), to make this plugin less dependent on commands.

An extremely accurate auto-fix for lava and water streams.

With this plugin, you can have permissions for water/lava buckets, and permissions for using separate features of the plugin.

When it rains, Flow fills a configurable amount of buckets with water, with a configurable delay. Of course, there are permissions for this, and this will only work if the player has a bucket, and the player is directly in the rain.

Flow is very good at keeping away from bugs. If I ever do find a bug that isn't a simple fix, I will keep working on it, and in the meantime, I will warn you about it, so you can do something to fix it.

This plugin adds functionality to sponges, something that few plugins do. Also, this plugin provides new mechanics for sponges, which will forever change the way you see sponges, and will prevent bugs that all other plugins have not solved! New sponge mechanics will save all water blocks around sponges, and replace them when the sponge is destroyed, only if they are still air. Not only does this prevent streams and annoying water-holes, but it also prevents grief caused by sponges.

When some materials get near liquids, they can react in certain ways. Gravel for instance, can turn into clay if physics are triggered near water, and sand can change into one of many things defined in the config. Sand can be changed to obsidian or glass when it interacts with lava.

A new feature that has never been done before is the addition of realistic liquids. When a bucket is placed, the liquid will lose its source, making the liquid flow to the lowest position nearby. This works especially well for water, but is currently bugged for lava, due to the weird way lava flows.

The height of liquids can be set by using a command, and then clicking a block next to a liquid. This can be really cool if you want to make puddles on your server.

Blocks like ice can be prevented from forming or melting. This can prevent players from using ice as a water source.

If a water stream is powered by redstone, it can be extended, which can be used to create a long stream of water, without having to dig downwards.