LimeWire是一套可搜寻、下载国际互联网上任何电脑上的共享文件。

LimeWire 是一个点对点档案分享软体，以 Gnutella 通讯协定为基础，不仅可以搜寻 mp3，还可以搜寻文件、程式、声音、影片、图片等类型，可保留多次的搜寻结果，并有多种平台的版本。

在 Napster 败诉之後，其他的点对点档案分享系统纷纷抬头，想要拉拢从 Napster 流出的人口，其中以使用 Gnutella 通讯协定的软体最多，各家以 Gnutella 公开版为基础，加上各种功能以及介面的改良，使得各家的程式各有特色。

LimeWire 就是使用 Gnutella 通讯协定的点对点档案分享软体之一，他不仅可以搜寻 mp3，还可以搜寻其他各种档案类型，包括有文件、程式、声音、影片、图片等类型，而且具有标签功能可以保留多次搜寻的结果，只要藉着标签便可以切换观看不同的结果。
一启动 LimeWire 便会自动连线到 GNU 伺服器，使用起来简单、有效率，也很稳定。

LimeWire is a peer-to-peer file sharing (P2P) client for the Java Platform, which uses the Gnutella network to locate files as well as share files. Released under the GNU General Public License, LimeWire is free software. It also encourages the user to pay a fee, which will then give the user access to LimeWire PRO. Recently LimeWire opened its own store. 

The PRO version offers some improvements over the Basic version:

It offers personalized technical support.
It provides more search results by connecting to 5 UltraPeers instead of 3 UltraPeers.
It comes with extra skins, including a special "PRO-only" skin.
It allows downloads to come simultaneously from 10 peers rather than only 8.