Actually, they're not at all PnP-ish
I used only creatures, that can be already found in standard game resources to minimize possibility of conflict with other addons
(only one 2da file edited).
Companions were based on original companions - Winter Wolf is very similar to Wolf companion, Worg to Dire Wolf, Phase Spider to Giant Spider etc. (so none of them should be overpowering). They were NOT based on any D&D manual!
The main purpose was to give extra choice for Druid and Rangers.
(I found on the vault addon called "PHB companions" but it contains only creatures up to level 20, and requires CEP to be installed. It was not updated since 2005)