IrfanView is a free image viewer and converter that supports an extensive list of formats.
RogueKiller is an anti-malware application that has been written in C++. The application is able to detect and then remove generic malware and also some advanced threats like rootkits and worms. RogueKiller can find malware by using a number of different techniques such as heuristics and signature finding.
SysGauge is a Swiss army knife System Information utility that can retrieve all kinds of information about your system. This version for 64-bit Windows ONLY!