While surfing I came across a Windows 7 Sidebar for Windows Vista and XP. The sidebar has gadgets like media players, Google search, yahoo search, weather, sticky notes, system uptime, POP3 mail retriever, RSS reader and lots of other useful gadgets.
The developers claim that it uses 50% less RAM and is faster than the original Microsoft Sidebar on Microsoft Windows Vista. So, taking these things into consideration the Windows 7 Sidebar should be a great choice even on a slow computer.
RELATED: Exact Vista Sidebar for XP