This is my current software stable.
Adobe: Lightroom 4.0, Photoshop CS5. Nik: Color Efex Pro 4.0, Silver Efex Pro 2.0, HDR Efex Pro 1.2, Viveza 2.0. Topaz Labs: Adjust 5.0, Denoise 5.0, Detail 2.0, Simplify 3.0, InFocus, Lens Effects 1.2, B&W Effects 1.1, Star Effects 1.1. Alien Skin: Snap Art 3.0, Bokeh 2.0. Photomatix Pro 4.1. Imagenomic: Noiseware 4.2. PictureCode: Noise Ninja 2.3. Redfield Plugins: Fractalius 1.7. Mediachance: ReDynaMix, Dynamic Auto-Painter 2.5. Totally Rad: Dirty Pictures 1.5. Flaming Pear: Designer Sextet. Red Giant Software: Magic Bullet PhotoLooks 1.5, Knoll Light Factory 3.2. Helicon Focus Pro 5.2. Flypaper Textures and Frames.
The entire lineup of Topaz products are a lot of fun. I find I use their Detail a lot, and Adjust and Simplify some, 98% of the time in layers, with opacity brushed in/out to taste. I've found Alien Skin Bokeh to be very helpful too. Most all of these have free trial demos so I'd encourage you to experiment. Some don't get much use but when I have an image that requires a certain look...they're there.
I hope this helps,
Phil