Surprised nobody has mentioned jEveAssets. Even if you don’t do industry it is a lifesaver: jEveAssets - Eve-Online Asset Manager - EVE.NiKR.NET
It shows job status, it allows you to create “stockpiles” and shows you if you have enough stuff (to build blueprints for instance) and then allows you to create shopping lists for one or more stockpiles. It shows you all your build materials (these are under the Tools menu), it lets you find anything you own where ever it is, etc., etc. Just get it now…
It also shows you your net worth if you are interested.