Most modular tool systems we've seen simply let you use the same battery packs for lots of different tools, virtually ensuring that you'll have one ready to go when a chore calls. The Black & Decker Modular Matrix System ($30-$70) instead lets you choose from one of three base units that connect to a variety of attachments, including a drill, impact driver, oscillating multi-tool, jigsaw, sander, router, and trim saw. Thanks to lithium-ion batteries that hold a charge up to 18 months, you can rest assured you're powered up and ready with the right tool for the job. [via]