FCKeditor是一款非常优秀的HTML在线编辑器，功能也可以定制. 也支持多种浏览器, 遵循LGPL版权。支持 asp、asp.net、html、php、pl、jsp 等等 使用最广的一款在线HTML编辑器。
最新版本的FCKeditor（v2.6 正式版）同时兼容绝大多数主流浏览器，包括: IE 5.5及以上版本 (windows), 火狐Firefox 1.0及以上版本, 遨游Mozilla 1.3及以上版本，网景7.0及以上版本。
On the server side, FCKeditor offers a complete integration pack for:
ASP.Net
ASP
ColdFusion
PHP
Java
Active-FoxPro
Lasso
Perl
Python

Changes in v2.6.3：
Fixed Bugs:
[#2412] FCK.InsertHtml() is now properly removing selected contents after content insertion in Firefox.
[#2420] Spelling mistake corrections made by the spell checking dialog are now undoable.
[#2411] Insert anchor was not working for non-empty selections.
[#2426] It was impossible to switch between editor areas with a single click.
Language file updates for the following languages:
Canadian French
[#2402] Catalan
[#2400] Chinese (Simplified and Traditional)
[#2401] Croatian
[#2422] Czech
[#2417] Dutch
[#2428] French
German
[#2427] Hebrew
[#2410] Hindi
[#2405] Japanese
[#2409] Norwegian and Norwegian Bokmål
[#2429] Spanish
[#2406] Vietnamese