Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Haji, there are quite a lot of open source IC design tools, which you can use for keeping yourself up-to-date. Particularly with Linux Fedora there is a package named Alliance, which includes tools for analog design such as schematic capture, NGspice, waveform viewer. There are also free Verilog simulators: Icarus and CVer.
You also can consider free spice simulators for PCB (LT Spice from Linear Tech) or demo versions of commercial tools such as Symica (Symica.com).