Free fun software for linux

Just For Fun Network Management System is a PHP-based network management system that features an integrated syslog, Tacacs, TFTP configuration downloading, SNMP polling, SNMP traps, journalling, auto-discovery, performance graphs (RRD), SLAs, and a lot more.
Just For Fun Network Management System uses MySQL or PostgreSQL as the backend and works under Linux and Windows.
Main features:
- Written in PHP4 (works in PHP5 too)
- Fully tested on Linux, FreeBSD and Win2K
- Should work on any other system which supports PHP
- PHP/cron scripts for polling, analizing and consolidating data
- Database Backend MySQL or PostgreSQL
- Configurable Event Types and Severity Levels
- Modular and Extensible
- Advanced Event Filter
- Interface Autodiscovery
- Licensed under the GNU GPL
- Event Console, Shows Events / Tacacs / Syslog / Alarms in the same time-ordered display
- Map & Sub-Map support
- Graphical Interface Traffic, Round Trip Time, Packet Loss Monitoring, and a LOT more
- Variable Time Span in the graphs
- Total Administration via web
- Sound Alerts in your browser
- Events RDF Feed (for newstickers)
- Works with HTTPS
- Traffic Bytes
- Utilization %
- Packets per Second, Errors per Second, Error Rate
- Round Trip Time and Packet Loss (Cisco & Smokeping)
- Drops
- TCP Connections: Incoming, Outgoing, Established, Delay
- Number of Processes, Number of Users
- Used Memory and Disks with Aggregation
- Processor Utilization and Load Average
- Temperature
- Interfaces (Network cards)
- Host (Processor, Load Average)
- Storage (Disks and Memory)
- Applications Running (HostMIB)
- Cisco Ping (RTT & PL on Cisco)
- BGP4 (BGP sessions status)
- TCP (TCP Connections, Delay)
- Cisco MAC Accounting
- Cisco IP Accounting
- Cisco CSS
- Cisco SA Agent
- Cisco Enviormental (Temperature, Voltage, etc)
- Internet Information Server (IIS) MIB
- Livingstone PortMaster3 Serial Line MIB
- Compaq Insight Manager MIB (Disk, Fan and Temperature)
- Apache /server-status monitoring
- TCP Port Content Regexp Checking (or URL)
- Configurable per Circuit SLAs (with RPN logic)
- Internal Authorization Framework
- Per Event Journals and Acknowledge
- Triggers / Actions Framework for email/others alerts.
- Database Abstraction Framework
- CSV Export
- Distributed Polling
- Object Oriented
- Consistent API
Enhancements:
- Better support for PHP 5 and RRDTool 1.2.x, OS/400 integration, Dell Chassis alarm monitoring, and fixes for all reported issues.

AquiGNOME provides a fun, clean and different icon set for Gnome.
This is a preview of my first icon theme, for sometime now ive been wanting to do a icon theme thats different. Im planning to do the main common GNOME apps icons, then work on mime types. I had some great ideas comming for icons like soundjuicer, etc and the hole idea of this icon set is, fun, clean and different.
Icons were designed in Inkscape and colour corrected in The GIMP.
Enhancements:
- Added new filesystem icons when using "connect to server" feature, ftp, nfs, ssh, smb.
- Added more mimetypes, now over 50 in total.
- Added some new application icons like firefox, gnome menu icons and a couple for gnome control center.
- Added actions and stock icons.
- Fixed a few names that where wrong with devices.
- Didnt use any colour saturation on icons, slightly less colourful.
- Added a new screenshot of with firefox icon.

Fire Encrypter is an Firefox extension which gives you encryption/decryption and hashing functionality right from your Firefox browser, mostly useful for developers or for education & fun.
The new FireEncrypter is ready! (v-3.0, this version contains the following ciphers:
- AES (Rijndael 128Bit)
- Affine
- Caesar
- XOR
- OTP (One Time Pad)
- Vigenere
- Rail Fence
- Morse Encoder
- MD2 Hashing
- MD5 Hashing
- SHA1 Hashing
- SHA256 Hashing
- SHA384 Hashing
- SHA512 Hashing
- Secure password generator.

World of Padman is a multiplayer Fun Action Shooter at Q3 Engine base.

World of Padman was a popular total conversation mod for the quake 3 engine.

Since the release of the gpled sourcecode, their team-members are worked hard to brush up the maps, models and the whole bunch of other things that belongs to a superior mod. They Invented new weapons, gaming goals on so on.

Today it is the day to proudly anounce the availibility of WoP for Linux, MacOsX and Windows, also.

The standalone game is an funshooter at its best! Come and try it for free, you have nothing to invest but your download time.

The game comes absolutly free as in beer. For details for the copyrighted graphics read at the project site http://worldofpadman.com.

p0f is a versatile passive OS fingerprinting and masquerade detection utility, to be used for evidence or information gathering on servers, firewalls, IDSes, and honeypots, for pen-testing, or just for the fun of it.

p0f project is a complete rewrite of p0f version 1 that used to be maintained by William Stearns.

Tuxball is a simple basketball shooting game.

A little C#/Cairo experiment and pretty much still is but it turn out to be pretty fun, imo. Main idea was to develop something like winhoops for Windows.

Blokken project is a ducational software which makes studying more enjoyable.

Blokken is an application whose aim is to help children in primary and secondary education by making studying more fun and enjoyable. It uses lesson files which can be made with any editor or with the provided builder.

BW3 is a mini-cd live distro, continuing in the philosophy of the original floppy-distro BrutalWare .

BW3 is based on Tomas Matejiceks Linux Live scripts. BW3 contains bonus software of your "daily use" or for fun. BW3 also contains some stuff from the hysterias famed "arxiv".