daemon turns other processes into daemons. There are many tedious tasks that need to be performed to correctly set up a daemon process; daemon performs these tasks for other processes. This is useful for writing daemons in languages other than C, C++, or Perl (e.g. sh, Java). If you want to write daemons in languages that can link against C functions (e.g. C, C++), see libslack, which contains the core functionality of daemon.
Firewall is a set of scripts (firewall, fwup, and fwdown) that implement an ipchains firewall and various forms of network address and port translation. All you have to do is read the policy file and edit it to reflect your topology and filtering policy. It supports many different types of network topology (single host, traditional forwarding, masquerading, port forwarding, alias port forwarding and NAT), up to 10 untrusted interfaces each with their own policy, and over 50 network applications. It also supports centralised administration of multiple remote firewalls (meta-firewall).
Libslack is a library of general utilities designed to make UNIX/C programming a bit easier on the eye. It was originally implemented as part of the daemon program. It's a small library with lots of functionality, is accurately documented and was thoroughly tested. Good library naming conventions are not rigorously observed on the principle that common operations should always be easy to write and code should always be easy to read.
gtklean is a C header file generated directly from the GTK+ headers to provide a visually cleaner and less error prone C API for GTK+. It eliminates gtk_ prefixes in front of every GTK+ function. It automatically inserts calls to the type checking and casting macros for arguments that require them (e.g. GTK_WIDGET() and GTK_SIGNAL_FUNC()) so you can't forget them and never need to see them. It also replaces the string literals used for signal names with C identifiers to replace run time errors with compile time errors.
Noexcuses is a disaster recovery utility. It makes cron jobs persist when faced with transient remote errors. It makes cron jobs persist across reboots of the local cron host. It identifies and runs cron jobs scheduled while the cron host was down. It can mirror its state to protect the above from disk failure. It supports relocation of cron jobs to another cron host. It lets you report, examine, cancel, and run outstanding cron jobs. In short, it eliminates much tedious disaster recovery work.
Textmail filters a mail message or mbox, replacing MS Word, MS Excel, HTML, RTF, and PDF attachments with the plain text contained therein. By default, the following attachments are also deleted: image, audio, video, and MS Windows executables. MS winmail.dat attachments are replaced by any attachments contained therein, which are then replaced by text or deleted in the same fashion. Any of these actions can be suppressed with the command line options. Mail headers can also be selectively deleted.
Broadband-usage meters the traffic on an SNMP-enabled broadband modem or router and then lets you find out your usage by calendar month. Its main purpose is to let you know what your usage is without having to resort to your ISP's Web site and without having to trust their accounting. If they get their accounting wrong (which can happen), this software gives you data that you might be able to use when contesting the invoice.