1.
ARENA - Quake 3 Engine Arena File
2.
BMK - Nokia Device Bookmark File
3.
CEL - Celestia Script File
4.
CFG - Wesnoth Markup Language File
5.
CONF - Generic Configuration File
6.
CSS - Cascading Style Sheet
7.
DIZ - Description in Zip File
8.
DSC - Text Description File
10.
ERB - Ruby ERB Script
12.
GALAXY - Blizzard Galaxy File
13.
ICF - Zoom Router Configuration File
14.
INFO - Generic Information File
16.
JAV - Java Source File
17.
JSON - JavaScript Object Notation File
18.
KDS - KD Player Skin File
20.
LIST - JAR Index File
23.
M - Mathematica Input File
26.
MARKDOWN - Markdown Documentation File
27.
MD - Markdown Documentation File
28.
MDINFO - iPhone Backup Information File
29.
MDL - Warcraft 3 3D Model Text File
30.
ME - Readme Text File
31.
MENU - Quake 3 Engine Menu File
32.
MISSION - Vega Strike Mission File
33.
MNU - TomTom Menu File
34.
MPS - Mathematical Programming System File
35.
MXML - Flex MXML Component
36.
OCR - FAXGrapper Fax Text File
38.
P6 - Perl 6 Source Code File
39.
PANIC - Kernel Panic File
40.
PHL - Kindle Popular Highlights File
41.
PID - Process ID File
42.
PP - Pocket Physics Sketch File
44.
PYM - PYM Macro Preprocessor File
46.
RTF - Rich Text Format File
47.
RTFD - Rich Text Format Directory File
48.
RTX - Rich Text Document
49.
S2ML - StarCraft 2 Map Localization File
50.
S2QH - StarCraft 2 Localization Header File
51.
SHADER - Quake 3 Engine Shader File
52.
SHTM - HTML Server Side Include File
53.
SLST - Game Data File
54.
SMALI - Android Smali Assembly Language File
55.
SOUNDS - Quake 3 Engine Sound Definition File
56.
SPS - Quake 3 Engine Speaker Definition File
57.
SQL - Structured Query Language Data File
58.
SSC - Celestia Solar System Catalog File
59.
SYSTEM - Vega Strike Virtual System File
60.
TRI - Triangle Mesh File
61.
TXT - Plain Text File
62.
URL - Internet Shortcut
63.
UTF8 - Unicode UTF8-Encoded Text Document
64.
VNT - Mobile Phone vNote File