The Powder Toy is a physics "sandbox" game that simulates a variety of elements including air pressure, velocity, heat, gravity and a countless number of interactions between different "substances" drawn on to the 2D landscape. Included are a variety of different materials, liquids, gases, and electronic components are available to construct complex machines (including catapults, guns, and bombs) as well as realistic terrains and environments. You can then mine them and watch explosions, add intricate wirings, play with stickmen or operate your machine.
The program features a vibrant community of available saved worlds and creations and is built on a platform that welcomes automation and tweaking.
Cross-platform (Mac and Linux)
DSpeech is a text-to-speech program with the option of saving the output to a variety of formats, great for creating audio books from text sources. It also supports dynamically changing the features of the voices eg. insert pauses, emphasize specific words, spell them out etc. using tags.
The program works out-of-the-box on WinXP and above, using the included Microsoft speech engine SAPI5. For WinNT/2K, you will need to install the speech engine separately. You will find links to plugins, speech engines and voice sets on the program website.
The program can import text from TXT, DOC, DOCX, RTF, HTML, XML, and PDF and output to MP3, OGG, AAC, WMA.
If your faucet is spraying water all over the place when you turn it on, it could be caused by mineral buildup. This vinegar trick will get things running smoothly again.