Latest user agents (if you are looking for complete list, download it here):

• Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; PCQuest)
• Opera/1.00 (Windows 98; U; en)
• Opera/8.86.(Windows 98; kok-IN) Presto/2.9.160
• Opera/9.74.(Windows 98; gez-ER) Presto/2.9.170
• Opera/8.56.(Windows 98; sk-SK) Presto/2.9.190
• Opera/9.44.(Windows 98; wae-CH) Presto/2.9.172 Version/12.00
• Opera/9.80 (Windows 98; U; de) Presto/2.6.30
• Opera/9.80 (Windows 98; U; ru) Presto/2.10.229
• Opera/7.02 (Windows 98; U)
• Opera/9.80 (Windows 98; U; de-DE) Presto/2.2.15
• Mozilla/4.5 (compatible; HTTrack 3.0x; Windows 98)\r\nAccept: text/html,image/png,image/jpeg,image/pjpeg,image/x-xbitmap,image/svg+xml,image/gif;q=0.9,*/*;q=0.1\r\nAccept-Language: en
• Opera/8.50 (Windows 98; en-US) Presto/2.11.243
• Opera/7.01 (Windows 98; U) [es]
• Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; digit_may2002
• Opera/7.54 (Windows 98; U) [pl]
• Mozilla/5.0 (Windows; U; Win98; hu-HU; rv:1.7.12) Gecko/20050919 Firefox/1.0.7
• Mozilla/5.0 (compatible; MSIE 6.0; Windows 98; Trident/5.1)
• Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; Win 9x 4.90; .NET CLR 1.1.4322)
• Mozilla/4.0 (compatible; MSIE 5.5; Windows 98; T312461; .NET CLR 2.0.50727)
• Mozilla/5.0 (compatible; MSIE 6.0; Windows 98; Trident/4.1)
• Opera/8.54.(Windows 98; ia-FR) Presto/2.9.172 Version/10.00
• Opera/8.47.(Windows 98; hsb-DE) Presto/2.9.166 Version/11.00
• Mozilla/5.0 (compatible; MSIE 6.0; Windows 98; Trident/4.0)
• Mozilla/5.0 (compatible; MSIE 6.0; Windows 98; Win 9x 4.90; Trident/4.0)
• Mozilla/5.0 (compatible; MSIE 6.0; Windows 98; Win 9x 4.90; Trident/5.1)
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.1) Gecko/20010607 Netscape6/6.1b1
• Mozilla/5.0 (Windows; U; Win98; de-DE; rv:0.9.4) Gecko/20011019 Netscape6/6.2
• Mozilla/5.0 (Windows; U; Win98; de-DE; rv:0.9.4) Gecko/20011128 Netscape6/6.2.1
• Mozilla/4.0 (compatible; MSIE 6.0; Windows 98) Opera 7.20 [en]
• Mozilla/5.0 (Windows; U; Win98; de-DE; rv:1.4) Gecko/20030619 Netscape/7.1 (ax)
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.19) Gecko/20081204 SeaMonkey/1.1.14
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.3b) Gecko/20030210
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8a6) Gecko/20050111
• Mozilla/5.0 (Windows; U; Win98; fr-FR; rv:1.0.2) Gecko/20030208 Netscape/7.02
• Mozilla/5.0 (Windows; U; Win98; de-DE; rv:1.4b) Gecko/20030516 Mozilla Firebird/0.6
• Opera/7.01 (Windows 98; U) [en]
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.13) Gecko/20060410 Firefox/1.0.8
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.0rc2) Gecko/20020510
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.24) Gecko/20100228 K-Meleon/1.5.4
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.4pre) Gecko/20070404 K-Ninja/2.1.3
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax)
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.0.6) Gecko/20060729 SeaMonkey/1.0.4
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.17pre) Gecko/20080716 K-Meleon/1.1.6
• Mozilla/5.0 (Windows; U; Win98; de-DE; rv:1.7.7) Gecko/20050414 Firefox/1.0.3
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.2pre) Gecko/20070111 SeaMonkey/1.1
• Mozilla/5.0 (Windows; U; Win98; de-DE; rv:1.8.1.24) Gecko/20100228 K-Meleon/1.5.4
• Opera/8.44.(Windows 98; th-TH) Presto/2.9.177 Version/10.00
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4b) Gecko/20030516 Mozilla Firebird/0.6
• Mozilla/5.0 (Windows; U; Win98; de-DE; rv:1.5a) Gecko/20030728 Mozilla Firebird/0.6.1
• Mozilla/5.0 (Windows 98; U; en) Opera 8.54
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.0.7) Gecko/20060917 K-Ninja/2.0.4
• Mozilla/4.0 (compatible; MSIE 6.0; Windows 98) Opera 7.54u1 [en]
• Mozilla/5.0 (Windows; U; Win98; de-AT; rv:1.5) Gecko/20031007
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.13) Gecko/20080313 SeaMonkey/1.1.9
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.5) Gecko/20060127 Netscape/8.1
• Opera/8.53 (Windows 98; U; en)
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.2a) Gecko/20020910
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.8pre) Gecko/20071019 Firefox/2.0.0.8 Navigator/9.0.0.1
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.3) Gecko/20030312
• Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 6.0 [en]
• Mozilla/5.0 (Windows; U; Win98; fr-FR; rv:1.7.7) Gecko/20050414 Firefox/1.0.3
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.2) Gecko/20070222 SeaMonkey/1.1.1
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4a) Gecko/20030401
• Mozilla/5.0 (Windows; U; Win98; en-GB; rv:0.9.4) Gecko/20011128 Netscape6/6.2.1
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.0.8) Gecko/20061030 SeaMonkey/1.0.6
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.4.1) Gecko/20020508 Netscape6/6.2.3
• Opera/6.05 (Windows 98; U) [fr]
• Opera/6.01 (Windows 98; U) [de]
• Opera/7.03 (Windows 98; U) [en]
• Mozilla/5.0 (Windows; U; Win98; de-AT; rv:1.7.3) Gecko/20040910
• Mozilla/5.0 (Windows; U; Windows 98; en-US; rv:1.8.1.5pre) Gecko/20070710 Firefox/2.0.0.4 Navigator/9.0b2
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.21) Gecko/20090331 K-Meleon/1.5.3
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.0.2) Gecko/20060404 SeaMonkey/1.0.1
• Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 6.04 [pl]
• Opera/7.03 (Windows 98; U) [de]
• Opera/6.05 (Windows 98; U) [en]
• Mozilla/5.0 (Windows; U; Win98; de-DE; rv:0.9.4.1) Gecko/20020508 Netscape6/6.2.3
• Opera/8.54 (Windows 98; U; en)
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.12) Gecko/20080201 SeaMonkey/1.1.8
• Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 5.12 [de]
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.9) Gecko/20071030 SeaMonkey/1.1.6
• Mozilla/5.0 (Windows; U; Win98; fr-FR; rv:0.9.4) Gecko/20011019 Netscape6/6.2
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.1 (ax)
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.3) Gecko/20040910
• Opera/7.0 (Windows 98; U) [en]
• Mozilla/4.0 (compatible; MSIE 6.0; Windows 98) Opera 7.50 [en]
• Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; de) Opera 8.02
• Mozilla/4.0 (compatible; MSIE 6.0; Windows 98) Opera 7.23 [en]
• Mozilla/5.0 (Windows; U; Win98; de-DE; rv:1.7) Gecko/20040803 Firefox/0.9.3
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1) Gecko/20061101 SeaMonkey/1.1b
• Mozilla/4.0 (compatible; MSIE 6.0; MSIE 5.5; Windows 98) Opera 7.03 [de]
• Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 6.03 [en]
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8.1.6) Gecko/20070802 SeaMonkey/1.1.4
• Opera/7.11 (Windows 98; U) [de]
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.3.1) Gecko/20030425
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.9) Gecko/20020311
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.3a) Gecko/20021212
• Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.5) Gecko/20050603 Netscape/8.0.2
• Mozilla/5.0 (Windows 98; U) Opera 5.12 [de]
• Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 6.01 [it]