Goodbye NumSum. Hello JotSpot Tracker! You can always trust the Jotspot guys to come up with great products, and it looks like they've done it again. JotSpot Tracker lets you copy and paste your Excel spreadsheets into the app, then work on them in a centralized space. From the blurb:
Stop emailing those Excel "tracking" spreadsheets. Simply copy and paste to publish them as an interactive web site. It only takes 30 seconds.
Copy and paste from Excel - Or choose from ready-made business and personal templates
Share it securely on the web -Invite your colleagues and clients to use it (or keep it private)
End "dueling versions" - Let people make their own changes in a centralized place
See calendar and map views - Your information the way it's meant to be seen - visually
Break out of the cells - Add file attachments, notes or anything else on the web
Your data is yours - Export your data back into Excel at any time