Knowledge base

We are looking for robust, not expensive knonwledgebase management software. Mininmal requirements are - we want to host it on our servers - change colors/css to match our design - ability to display content for different groups. - and of course easy to use.

I've made the final decisions on most of other parts except for the mobo, hope you guys can help. Thank in advance Core I5 - 4460 (3.2Hz) Palit Nvidia GTX 970 JetStream 4GB ( 256 Bit ) DDR5 G.Skill F3-14900CL9D-8GBXL (2x4GB) HDD 1TB WD (Black) - WD1003FZEX SSD Corsair 128GB (F128GBGS - BK)...