Just-ping, traceroute, dns lookup.

Online web-based ping: remote ping a server or web site using our network with 40 checkpoints worldwide
http://just-ping.com/

Online traceroute: from 4 locations @ Just-traceroute.com
http://just-traceroute.com/

Online dns lookup: remote dns lookup (nslookup/dig) a host or domain from multiple checkpoints worldwide
http://just-dnslookup.com/

BitBlaze

Malware Analysis Service.
https://aerie.cs.berkeley.edu/submitsample-d.php

F-Secure

Sample Analysis System.
https://analysis.f-secure.com/

MalwareURL

is a group of Internet security experts dedicated to fighting malware, Trojans and a multitude of other web-related threats.
http://www.malwareurl.com/

UploadMalware.com

is an easy way for you to submit files for analysis by anti-malware and security professionals.
http://www.uploadmalware.com/

Dasient Web Anti-Malware (WAM)

Dasient's malware infection library catalogs web-based malware from across the Internet.
http://wam.dasient.com/wam/infection_library_index

Identify File (**) by MD5, SHA1 or Others

FileAdvisor: MD-5 or SHA-1 hash of any file
http://fileadvisor.bit9.com/

RunScanner: Filename / Process / Guid / CLSID / MD5 hash
http://www.runscanner.net/

Prevx: (need to login)
http://www.prevx.com/

VirusTotal: hash by md5/sha1/sha256
http://www.virustotal.com/zh-tw/buscaHash.html

NoVirusThanks

If you have a suspicious file you can submit it in the form below and our system will analyze your file with 24 AntiVirus Engines and will report back the analysis result.
http://scanner.novirusthanks.org/

Malware Hash

is a free service offered by NoVirusThanks.org that collects the malicious MD5 hash of the files that are analyzed in the Malware & Virus Scan Service.
http://www.malwarehash.com/submit-file.php

Online Link Scan

Online Link Scan - Virus, Trojan, Adware and Malware Scanner
http://onlinelinkscan.com/
Prevent infection and data theft! Scan links for viruses, malware, spyware, and trojans with OnlineLinkScan.
Use our arsenal of tools to prevent infection, data theft and find out the trust score of a link.