Micro-Cap

Micro-Cap screenshots

Creates schematics with mixed analog/digital simulator and interactive sketch
Micro-Cap 10.0 : Passive filter designer

Alternative downloads

CAP 505
2.5.0
It can be used to program and monitor relays from ABB.
GUM Workbench
2.4.1.384
Evaluation of uncertainty in measurement with multiple result quantity.
CAP Tool
1.63
A Windows program to create arbitrary waveform generator files.