Dia is a great tool for creating diagrams. It has a huge in-built library of objects which are specially useful for software engineers. So making a diagram of a computer network is as easy as dragging a few computers and switches from the list of objects available. It currently has special objects to help draw entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and simple circuits. It is also possible to add support for new shapes by writing simple XML files, using a subset of SVG to draw the shape.

Gnucash

An average tech earns a good salary and spends it is well too. To keep track of all these personal expenses the best is to have a great software. Gnucash is an ideal way to manage personal finances. Designed to be easy to use, yet powerful and flexible, GnuCash allows you to track bank accounts, stocks, income and expenses. As quick and intuitive to use as a checkbook register, it is based on professional accounting principles to ensure balanced books and accurate reports.

KTuberling

And finally a product for all those techs who maintain their servers well and have no work or pending issues and yet have to sit through the nights waiting for some issue to popup.

KTuberling (http://opensource.bureau-cornavin.com/ktuberling/) was originally game intended for small children. Of course, it may be suitable for adults who have remained young at heart. Most techs in general love this software. It is a ?œpotato editor?? That means that you can drag and drop eyes, mouths, mustache, and other parts of face and goodies onto a potato-like guy. Similarly, you have a penguin and an aquarium on which you can drop other stuff.