| Thunderbird | Download des kostenlosen email-Programms |
| Spamhaus | Tracks Spammers, provides anti-spam protection for Internet networks and works to identify and pursue spammers worldwide |
| Mulberry | Free IMAP and other email protocols client with calendaring and scheduling for download for Mac OS X, Windows and Linux. |
| Sophos | Software and appliance solutions to protect networks from viruses, Trojans, worms, spyware and spam |
| Angstklauseln | Sammlung von über 100 e-mail disclaimern, welche oft an E-Mails angehängt werden, wenn es um vertrauliche Inhalte geht |
| SenderBase | Report of spam mail traffic and virus traffic. |
| DNS whitelist | Whitelist of known legitimate email servers to reduce the chances of false positives while spam filtering |
| Dsl-User | Anbietervergleich, Installationshilfen und andere Informationen für DSL-Zugänge |
| OLSR | pro-actvive routing protocol for mobile ad hoc networks which can be used to generate a longdistance computer network |
| DSL-Moden Hilfe | Freeware Software zum auslesen und optimieren von DSL-Modems und Optimierungstutorial für einige DSL-Modemtypen |
| Zyxel | Manufacturer of routers, modems and switches with product informations and download of drivers |
| Smart FTP | Download of a free FTP Manager. |
| Cyberduck | Open source FTP and SFTP (SSH Secure File Transfer) browser for Mac OS X licenced under the GPL
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| Filezilla | Fast FTP and SFTP client for Windows with a lot of features |
| ICQ | Instant messenger with 150 million registered users. |
| WinSCP | Download of a free free SFTP, FTP and SCP client for Windows |
| PuTTY | Download of a free Telnet and SSH Client software |
| Squid-Cache | free, open-source full-featured Web proxy cache |
| OpenSSH | Encrypts all traffic (and passwords) to eliminate eavesdropping, connection hijacking and other network-level attacks. |
| Sicher im Netz | Beratungsportal für Online-Sicherheit |
| Asterisk | A complete PBX in software for Linux, BSD and MacOSX. Does VoIP in many protocols, and almost all standards.
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| Cexx | Website with tipps and tools against spam and spyware. |
| Skype | Program to phone for free via the internet. |
| LogMeIn | Connects two or more computers via Internet into their own virtual network for direct secure communication. Free. |
| BugMeNot | Created as a mechanism to quickly bypass the login of web sites that require compulsory registration |