How about something that at least hints at the addon's purpose? I've always hated names like "Quartz" that give you no idea what the addon might do without reading a description. The above suggestions like "SwissTiming", "Rolex", and "Cesium" are just as bad -- they convey images of clocks and watches, not a WoW casting bar addon.
Hey I said it made me think of Rolex, not to use it, lol. :P
I'm bad at naming, so I'll refrain from suggesting
These days I like when addons have what they do in their names (e.g. xxxCastBar, xxxUnitFrames) because the Curse Client only lets you search by addon name, and has no ability to filter the addon list display by category (sort, yes, but not filter).