From the Christchurch, New Zealand Library system comes this reference for collective nouns for different types of animals: "caravan of camels", "pride of lions", "murder of crows", etc.
dead link: http://library.christchurch.org.nz/Childrens/FactSheets/AnimalGroupNames.asp
2020 Update: Here is an alternative list of such.
This tool makes church front announcement signs with up to four lines of your own text.
dead link: http://www.aboyandhiscomputer.com/churchsigngenerator/index.php
2020 Update: That site has apparently changed hands. There are similar sign generators out there, but not that one. Red Kid has a variety of formats including a similar school sign and Big Boy diner, and Oakland Grand Lake Theatre. A footnote says the site is based on the original code.
Specifications for various motherboard, power supply, etc, system components.
dead link: http://www.formfactors.org/
2020 Update: The old site redirects to an intel.com page but that really doesn't have much about various form factors. Oh well.
A large collection of specifications for computer cables and connectors. A little out of date, but good for older devices.
dead link: http://hardwarebook.net/
2020 update. Fixed link,
but the new site is kinda broken, like it's missing a style sheet.
And it gives completely different
content for http:// (real but broken) and https://
(a default site template).
qz thoughts