The NorCal club is reintroducing (or bringing back, if you prefer) the VE3DNL Marker Generator kit. This is a kit that is extremely well known in the QRP community and has received very good press over the years.
It is a 5.12 MHz oscillator which generates marker tones every 5, 10, 20 and 40 KHz. It's often been called the "Poor man's signal generator". Just about every treatise that's been written about kit building also mentions this one as one of the ideal "Beginner kits". It's very versatile and it's often been said that no serious radio builder (kits or scratch) should be without one.
If you're interested (and I am, too) in getting one, then http://www.norcalqrp.org is the place to go. The price is right, too. $7.50 for US orders and $10 for DX.
73 de Larry W2LJ