trend is a general-purpose, efficient trend graph for "live" data. Data is read in ASCII format from a file or continuously from a FIFO, and is played in real-time into a multi-pass trend (much like a CRT oscilloscope or a strip chart). trend can be used as a rapid analysis tool for progressive or time-based data series together with trivial scripting.
tresor is an application for performing full backup and fast restores with bytepositioning tape drives. This option is available on some Tandberg and Wangtek streamers and some SCSI-2 tape drives. It features flexible configuration, a database for multiple volumes, fast restores (due to direct seeking), a graphical user interface, tape operations based on dd, afio, and mt, and tape identification using its own header. Language support for German and English is included.
trickle is a lightweight, portable, per-application bandwidth shaper. It works in collaboration, has peak detection, and does smoothing. trickle works entirely in userland and does not require root to run. It has been developed on OpenBSD and is known to run on Linux, FreeBSD, and Solaris.
trojuhelnik is a general solver for triangles. It computes all possible solutions for a triangle that is specified by an arbitrary triple of the following elements: sides, angles, altitudes, medians, angle bisectors, area, radius of circumscribed and inscribed circle, sum a+b, perimeter and difference of the angles. All other elements, triangle visualization, and graphs of elements dependencies are also available.
trollhunter offers various tools to either analyze existing logfiles or monitor firewall activity in real time. Currently standard log messages generated by a Linux 2.4 kernel netfilter/iptables firewall are supported. You can choose from a Perl/Tk interface or run in commandline standard ASCII color TTY terminal.
trx is a toolset for broadcasting live audio from Linux. It sends and receives encoded audio over IP networks, via a soundcard or audio interface, and can be used for point-to-point audio links or multicast (e.g., private transmitter links or audio distribution). High-quality wideband audio (such as music) can be sent with low latency and fast recovery from dropouts.
tsdecrypt reads an incoming MPEG transport stream over UDP/RTP and then decrypts it using keys obtained from OSCAM or a similar CAM server. Currently supported crypto systems are Conax, Cryptoworks, Irdeto, Viaccess, Mediaguard (Seca), Videoguard (NDS), Nagra, DRE-Crypt, and Bulcrypt. BISS and constant code words are also supported. tsdecrypt communicates with a CAM server using the cs378x (camd35 over TCP) protocol or the newcamd protocol.