http://sourceforge.net/projects/akmeffmpeg/ - Akme FFmpeg Transcoder (conver/encode video/audio)
http://camstudio.org/ - an open source screen recorder in AVI format which can also convert to SWT (flash) format.
http://gnuwin32.sourceforge.net/packages.html - GNU Win32

http://mac.hk/appletalk/viewtopic.php?p=270931 - 嚴重痙攣患者对Ekho的需求
http://pitl.homedns.org/tts/demo00.asp - 港韵 TTS
http://sepc495.se.cuhk.edu.hk/cuvocal/Default.aspx - 中文大學「悠揚」語音合成系統
http://tdc.putonghuaonline.com/tools1.html - 看漢科技有限公司的 "e-Putonghua 網上學習平台"

a secret of the third tone
Falling-rising.
Third + Third = Second + Third: nǐ hǎo should sound like níhǎo.
Third + Second = Half a Third Tone + Second.

句末时第3声会有变化：

The 3rd tone can be produced in three different ways:

first half of a "3rd tone",

second half of a "3rd tone",

full 3rd tone

http://www.lrde.epita.fr/~adl/autotools.html - good autotools tutorial
https://wiki.ubuntu.com/PackagingGuide - build deb
http://ubuntuforums.org/showthread.php?t=51003 - Howto make debian standard debs from scratch
https://fedoraproject.org/wiki/How_to_create_an_RPM_package - How to create an RPM package

http://www.comptechdoc.org/independent/web/cgi/javamanual/ - Javascript
http://javascript.crockford.com/ - the best Javascript reference
http://www.ecma-international.org/publications/files/ecma-st/ECMA-262.pdf - ECMA-262

• Spectrum：频谱
• Pitch：音高
• Intensity：音强
• Formant：共振峰
• Pauses：脉冲
• Fundamental Frequency：基频（男：60－250Hz，女：75－450Hz）
• 宽带语图（元音、辅音）：男（0－5000Hz），女（0－5500Hz）
• 窄带语图（声调、语调）：男（0－1200Hz），女（0－2000Hz）

钢琴中央C为C4，标准音为A4频率为440Hz，G5频率为784Hz，A3=220Hz，A2=110Hz，A5=880Hz

参考：

• https://zhuanlan.zhihu.com/p/74547235
• 钢琴88个键的基音频率及与音分的关系

FreeDict - free bilingual dictionaries （可惜没有中文）

Zhongwen Development Tool - helping to study Mandarin Chinese

中文自然语言处理开放平台 - 中科院计算所自然语言处理研究组（有词典和很多重要的资料）

中文维基词典

搜狗互联网词库

Online Chinese Tool

uck-gui

LiveCDCustomizationFromScratch

http://wiki.ubuntu.org.cn/%E5%AE%9A%E5%88%B6Ubuntu%E5%AE%89%E8%A3%85CD